Answers
Answer:
proteins and carbohydrates
Explanation:
i just know
Related Questions
These protocells became the first unicellular life forms. Unicellular life
forms then gave rise to _____ life forms as cells began to specialize in function. These are the hypothesized sequence of events in early history
of life on earth. These steps are speculative but still scientific because
they are rooted in logic, firm science, and testable hypotheses.
a. multicellular
b. cell membrane
c. polymers
d. biomolecules
Answers
Answer:
Multicellular
Explanation:
This is the only answer that fits.
Which is a reasonable statement about the asteroid impact 65 million years ago
A. It caused birds to evolve from dinosaurs
B. Surviving organisms were able to diversify and spread
C. This event immediately increased biodiversity
D. It was the largest asteroid impact in the solar system
Answers
In some cattle, the genes for red hair and for white hair are codominant. Cattle with alleles for both red and white hair have both red and white hairs. This condition is referred to as roan.
What is the probability, expressed as a ratio, of a white cow and a red bull having an offspring with the heterozygous genotype?
A. 1 homozygous white : 1 homozygous red : 1 heterozygous
B. 3 homozygous white : 1 homozygous red : 0 heterozygous
C. 0 homozygous white : 0 homozygous red : 1 heterozygous
D. 1 homozygous white : 1 homozygous red : 0 heterozygous
Plz help :((((
Answers
Answer:
Explanation: There is more than 1 pattern of inheritance that also is an example of lack of dominance. In this situation, if the resulting phenotype exhibits both of its parents traits, the offspring phenotype is most likely going to be the result of codominance
when does energy transfer from a cold object to a hot object?
Answers
Answer:
Conduction occurs when two object at different temperatures are in contact with each other. Heat flows from the warmer to the cooler object until they are both at the same temperature. Conduction is the movement of heat through a substance by the collision of molecules.
Hope this helps
Answer:
Conduction occurs when two object at different temperatures are in contact with each other. Heat flows from the warmer to the cooler object until they are both at the same temperature. Conduction is the movement of heat through a substance by the collision of molecules.
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Explanation:
Why were the researchers surprised to find out how old the remains of the hobbit were ?
Answers
Answer:
The biggest surprise came when the scientists dated the remains to only about 18,000 years old. This small species of human existed at the same time aş Homo sapiens, the species that modern human beings belong to. ... This supports the idea that the hobbits are actually a separate species.
Explanation:
Final answer:
The age and physique of Homo floresiensis were surprising because they displayed both ancient and modern human features and were thought to show complex behaviors despite their diminutive size and brain, leading to theories of island dwarfing.
Explanation:
The researchers were surprised to find out how old the remains of Homo floresiensis, also known as "the Hobbit", were because these remains challenged previous conceptions of human evolution. Not only was the species dated to approximately 100,000-60,000 years ago, which overlaps with the existence of modern humans, but their small stature and tiny brain volume were unexpected for that time period. The discovery of Homo floresiensis in the Liang Bua cave also showed evidence of sophisticated behaviors like the use of fire for cooking, which suggests complex cognitive abilities despite their small brain size. This combination of ancient dating and unexpected physical characteristics led to theories of regional evolutionary adaptations like insular dwarfing, which posits that limited resources on the island of Flores favored smaller body size over time.
PLEASE HELP I'll MARK THE BRAINLIEST
1.) A vessel that carries oxygen-rich blood to the heart muscle is called a(n): *
A.) Coronary Artery
B.) Vein
C.) Ventricle
D.) Atrium
2.) A group of cells that receives messages about the body's oxygen needs and sends out signals to adjust the heart rate is called the: *
A.) Atrium
B.) Lymph Node
C.) Valve
D.) Pacemaker
3.) Blood components that helps the body control bleeding are: *
A.) Hemoglobin
B.) Red Blood Cells
C.) White Blood Cells
D.) Platelets
4.) Plasma is mostly composed of: *
A.) Blood Cells
B.) Water
C.) Proteins
D.) Hemoglobin
5.) Which of the following is NOT a characteristic of a vein? *
A.) Valves prevent backward flow of blood
B.) Returns blood to the heart
C.) Walls are one cell thick
D.) Walls are generally thinner than those of arteries
6.) The largest artery in the body is called the: *
A.) Aorta
B.) Atrium
C.) Pacemaker
D.) Coronary Artery
7.) The network of vessels that returns fluid to the bloodstream is called the: *
A.) Lymphatic System
B.) Veins
C.) Arteries
D.) Circulatory System
8.) Hemoglobin is a protein that binds easily to: *
A.) White Blood Cells
B.) Oxygen
C.) Fibrin
D.) Platelets
9.) Which of the following structures pumps blood into arteries leading to the lungs? *
A.) Right Atrium
B.) Left Atrium
C.) Right Ventricle
D.) Left Ventricle
10.) Which of the following structures is NOT part of the cardiovascular system? *
A.) Heart
B.) Blood Vessels
C.) Brain
D.) Blood
11.) True/False: The force of the heart's contracting atria causes blood pressure. *
A.) True
B.) False
12.) True/False: Capillary walls must be very thick to withstand the high force of blood pumped by the heart. *
A.) True
B.) False
13.) True/False: White blood cells defend the body against disease. *
A.) True
B.) False
14.) True/False: Blood travels in two directions in the body. *
A.) True
B.) False
15.) True/False: Blood types are determined by proteins known as marker molecules that are on red blood cells. *
A.) True
B.) False
16.) Fill in the Blank: The right and left __________________ are the two lower chambers of the heart. *
17.) Fill in the Blank: A sphygmomanometer is an instrument that measures ____________________________. *
18.) Fill in the Blank: A flap of tissue that prevents blood from flowing backward is a(n) ______________. *
19.) List two of the three main roles of the cardiovascular system: *
20.) Tell me anything else that you learned in science about the cardiovascular system:
Answers
Answer:
coronary arteries
Oxygen is supplied to the heart muscle by the coronary arteries. These are the blood vessels that wrap around the surface of the heart: The left main coronary artery branches into the: Circumflex coronary artery, which supplies blood to the back left side of the heart
Answer:
Answers:
1.)- Coronary Artery
2.)- Pacemaker
3.)- Red Blood Cells
4.)- Water
5.)- Walls are one cell thick
6.)- Aorta
7.)- Lymphatic System
8.)- Oxygen
9.)- Right atrium
10.)- Brain
11.)- False
12.)- True
13.)- True
14.)- False
15.)- True
16.)- Ventricles
17.)- Blood pressure
18.)- valve
19.) The cardiovascular system consists of the heart, blood vessels, and blood. This system has three main functions: Transport of nutrients, oxygen, and hormones to cells throughout the body and removal of metabolic wastes (carbon dioxide, nitrogenous wastes).
20.) Random Facts:
The average heart is the size of a fist in an adult.
Your heart will beat about 115,000 times each day.
Your heart pumps about 2,000 gallons of blood every day.
Explanation:
:3 took a long time but ya
Fill in the Blanks:
Matter transfers into and out of the physical environment at every level. Decomposers
________nutrients from dead plant or animal matter. The nutrients go back to the soil in terrestrial environments. The nutrients go back to the
water in aquatic environments. The atoms make up organisms. These atoms get transferred repeatedly between the living and________parts of the ecosystem.
Answers
Answer:
Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments. The atoms that make up the organisms in an ecosystem are cycled repeatedly between the living and nonliving parts of the ecosystem.
Answer:
Decomposers recycle first and Nonliving second
What is a property of soil that determines how water will soak through the
ground?
A. Capillary action
B. Permeability
C. Gravity
D. Aquifer
Answers
Which sentences describe the differences between photosynthesis and cellular respiration?
Check all that apply.
Cellular respiration uses oxygen as a reactant and photosynthesis does not.
Cellular respiration produces glucose and photosynthesis does not.
Cellular respiration produces excess ATP and photosynthesis does not.
Cellular respiration stores energy from the Sun in glucose molecules and photosynthesis does not
Cellular respiration is performed by consumers and photosynthesis is not.
O Cellular respiration releases energy from glucose molecules and photosynthesis does not.
Answers
Answer:
A, C, E, F. Are the answers :p
Explanation:
Trust me, Thank me later :)
Final answer:
Photosynthesis and cellular respiration serve opposite functions in the energy cycle. Photosynthesis creates glucose and oxygen from sunlight, which are then used by cellular respiration to release energy, producing ATP and emitting carbon dioxide and water.
Explanation:
The differences between photosynthesis and cellular respiration include their distinct roles in the energy cycle. Photosynthesis uses sunlight to create glucose and oxygen, which are then used in cellular respiration. Cellular respiration releases energy by breaking down glucose in the presence of oxygen, which results in producing ATP and emitting carbon dioxide and water as byproducts. One of the key differences is that photosynthesis stores energy from the sun within glucose molecules, while cellular respiration releases the stored energy from glucose to produce ATP, powering cellular activities.
Therefore, the following sentences describe the differences between photosynthesis and cellular respiration:
Cellular respiration uses oxygen as a reactant while photosynthesis produces it.
Cellular respiration releases energy from glucose molecules which is used to create ATP, a process not performed by photosynthesis.
Cellular respiration is primarily performed by consumers, organisms that cannot produce their own food, unlike photosynthetic organisms that can produce glucose.
The incorrect statements include that cellular respiration produces glucose (which is actually produced by photosynthesis), and that cellular respiration stores energy from the sun in glucose molecules (which is a function of photosynthesis).
During an experiment readings for blood pressure in a person's body were found to be constant. However, when measured by a
different blood pressure cuff, the readings differed by 15 points for each reading. This difference indicates that the results are
but not
Answers
This question illustrates how blood pressure readings can vary based on measurement methods and the position of the body. Factors like the type of cuff used and the subject's posture during measurement can lead to differences in readings, which are significant for diagnosing conditions like hypertension.
Explanation:The question refers to an important concept in health and medicine, specifically concerning the measurement of blood pressure. Blood pressure is typically recorded as systolic/diastolic, and readings can be affected by factors such as the type of blood pressure cuff used, the person's state of mind, body positioning, etc. The question seems to be confused by the fact that different cuffs gave different readings, which might indicate that the results are inconsistent, but not necessarily incorrect. It should be noted that blood pressure can vary depending on a variety of factors, including the positioning of the cuff. For example, raising an arm above the shoulder or placing the cuff on the upper leg with the person standing can affect the pressure reading due to the weight of the fluid (blood) in relation to gravity. Also, mercury manometers are preferred over water manometers for measuring blood pressure due to their ability to measure larger pressures and because the density of mercury makes readings more manageable.
Which practice is illegal under the Endangered Species Act?
O
A. Creating species survival plans
O
B. Reintroducing endangered species
C. Collecting endangered species
O
O
D. Captive breeding
Answers
Answer:
its C. Collecting endangered species
Explanation:
Collecting endangered species is illegal under the Endangered Species Act. So, the correct option is C.
What are Endangered species?A species that is threatened with extinction in the not-too-distant future, either globally or within a certain political jurisdiction, is known as an endangered species.
Invasive species, habitat degradation, poaching, and other issues may put endangered animals in danger. Species that are in danger of going extinct are considered to be endangered species. Alternatively put, species that are on the verge of extinction.
An organism that faces extinction is referred to as an endangered species. The two main factors that cause a species to become endangered are habitat loss and genetic diversity loss. Natural occurrences may result in habitat loss.The Endangered Species Act forbids the collection of endangered species.
Therefore, the correct option is C.
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Water is a chemical compound that is made of hydrogen and oxygen atoms bonded together. Water makes up from 50 to 90 percent of a living organism. The remaining mass of the organism consists of a variety of carbon-containing compounds. A valid conclusion that can be drawn from these statements is that living things are composed of
inorganic matter only
neither organic nor inorganic matter
organic matter only
both organic and inorganic matter
Answers
Answer:
Organic matter only
Explanation:
Answer:
both organic and inorganic matter
Explanation:
Organic compounds essential to human functioning include carbohydrates, lipids, proteins, and nucleotide.
Inorganic compounds essential to human functioning include water, salts, acids, and bases. These compounds are inorganic; that is, they do not contain both hydrogen and carbon.
ANSWER ASAP ILL GIVE U 200 POINTS IF U ANSWER IT RIGHT ON A BLANK QUESTION
Part C: Observing Rhizobium with a Microscope
(Score for Question 3: Click or tap here to enter text. of 5 points)
3. Sketch the bean nodule, labeling cells with and without Rhizobium, showing what you observed with the microscope.
Answer:
Type your answer here. Click or tap here to enter text.
Conclusions
(Score for Question 4: Click or tap here to enter text. of 2 points)
4. Two new species of plants were introduced into an area that was low in available nitrogen compounds in the soil. One formed nodules and one did not. Which species would you reasonably expect to grow more robustly? Explain.
Answer:
Type your answer here. Click or tap here to enter text.
(Score for Question 5: Click or tap here to enter text. of 2 points)
5. How does the location of the nodules relate to the function of the nodule? Explain.
Answer:
Type your answer here. Click or tap here to enter text.
(Score for Question 6: Click or tap here to enter text. of 2 points)
6. This diagram shows two groups of plant cells, one with Rhizobium and one without the bacteria. Label which is which, and explain the obvious size difference, using observations from Part C of the lab in your answer.
Answers
Answer:
4. the plant specie with nodule grows robustly as compared to without nodule.
5. the location of nodule in plants are the roots where they perform their function.
6. The size of plant cell with bacteria is high as compared no bacteria.
Explanation:
The plant specie with nodule grows robustly as compared to without nodule because in nodules a special type of bacteria is present which fixes atmospheric nitrogen for the plant and plant in return give food to the bacteria in the form of sugar. Nodules located in roots of the plants because plant absorb nutrients through the soil so the nodules provide nitrates to the roots in the soil. The size of plant cell with bacteria is high as compared no bacteria because bacteria needs space for growth so that's why plants plants cell with bacteria is large in size.
This is a living thing that grows in earth, in water, or on other plants and possess features such as :
RootStemLeaves etcThe most appropriate choice to the questions can therefore be seen above.
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The biologic mechanism which functions to maintain the internal condition of cells constant is called a control system.
postive
internal
homeostatic
Answers
Answer:
homeostasis
Explanation:
Can someone please help with this assignment?
I will make you the brainly user of the week.
I need this done by tonight and I’m struggling. Please help me someone.
Answers
what is the assignment
During a lunar eclipse, the moon turns dark
due to the deviation of the sun's rays
caused by Earth's atmosphere.
Answers
A lunar eclipse occurs when the Moon enters Earth's shadow, with both celestial bodies and the Sun aligned.
During a lunar eclipse, the Moon passes into the shadow of the Earth. This happens only when the Sun, Earth, and Moon are aligned with the Earth in the middle, meaning the Moon is in a full phase. While entering the darker part of Earth's shadow, known as the umbra, the Moon's brightness diminishes and may take on a reddish color.
The shadow of Earth can cover about four full moons at the Moon's average distance, which explains the total coverage during a lunar eclipse. Unlike a solar eclipse which is only visible from specific places on Earth and involves the Moon casting a shadow on Earth, a lunar eclipse can be seen by anyone on the night side of Earth as the Earth casts a shadow on the Moon.
As the Moon goes deeper into Earth's shadow, the curved shape of the shadow becomes apparent, indicating Earth's spherical shape. The distinct red hue observed during a total lunar eclipse is due to the Earth's atmosphere filtering out blue and green light and bending the remaining light towards the Moon, a phenomenon also seen during sunsets.
Which of the following sounds has the highest pitch?
500 Hz
1,000 Hz
2,000 Hz
Answers
Answer:
The answer is 2,000 HZ.
Answer:
2000 Hz
Explanation:
The pitch of the sound corresponds directly with frequency and that's why the higher the pitch, the more the frequency and vice versa.
Crocodile Steve was killed doing what he loved best - hanging out in the water, observing the wildlife around him. One wildlife adaptation cost Steve his life. Stingrays, catfish, and scorpion fish all have an adaptation that helps protect them against predators. This adaptation is
a. venom
b. mimicry
c. camouflage
d. electric organs
Answers
Answer:Venom
Explanation:
Scorpions have venom in their pinchers. Catfish have venom in their dorsal and pectoral fin which contains a venom that causes edema (swelling). Stingray’s each spine contains venom, and the stingray's tail.
Venom, many fish may defend themselves by injecting venom. The majority of venomous fish use their spines to deliver the poisons, hence option A is correct.
What is adaptation?
Many different fish have venomous spines, such as stingrays, chimeras, scorpionfishes, catfishes, toadfishes, rabbit fishes, and stargazers.
Crocodile Steve was slain while doing what he liked most: relaxing in the lake and taking in the local animals. Steve's life was lost due to a wildlife adaption. All three species of stingrays, catfish, and scorpion fish share an adaption that helps shield them from predators.
A near relative of scorpionfishes known as the stonefish is the most poisonous fish in the world. The stonefish may inject a poison that can kill an adult in less than an hour through the spines on its dorsal fin.
Therefore, venomous fish use their spines to deliver the poisons, hence option A is correct.
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Sarah drew a triangle with a angle measures of 50°, 43°, 87°
What kinda of triangle is it?
A.) acute
B.) isosceles
C.) obtuse
D.) right
Answers
Answer:
Acute
Explanation:
It only has angles less than 90°.
A cousin who has been traveling overseas sneaks a plant through customs (who help along with the USDA, help to prevent invasive species) wants to plant this plant in their backyard. What would you say to them to discourage them from doing so? Please facts and scientific reasoning to convince them not to and to destroy the plant.
Answers
Answer and Explanation:
Invasive species are not native to an ecosystem/environment to which they've been introduced, which can cause disastrous disruptions to various food chains/webs and other native species' populations.
In this case, your cousin is bringing in a plant from overseas, so it clearly will be an invasive plant. You can tell them the following:
- this plant may take over the feeding source of native plants, causing those populations to decrease drastically or possibly even be wiped out
- secondary consumers that had once relied on those native plants for food energy will now have limited resources, competition will increase, and these consumers may begin to die off
- tertiary consumers that consumed these secondary consumers will begin to die off, as well
- this chain reaction will ripple through the entire food chain and food web, and totally disrupt the existing ecosystem
Thus, your cousin shouldn't plant this organism in their backyard and should instead destroy it.
What are stem cells?
Answers
Stem in plants:
Is the movement of material like water and minerals from roots to leaves. And they storage foods.
how does the energy produced in the sun’s core reach the sun’s outer surface?
Answers
Answer:
some hydrogen particles collide and combine to form helium in a process called The process releases energy that travels through the core by radiation. Rising currents of hot gas in the convection zone carry energy toward the Sun's surface. :D That was the easy question
Explanation:
Which plant is an example of an annual weed?
Common burdock
O Queen Anne's lace
Crabgrass
Bull thistle
Answers
Using the drop-down menus, identify the structures common to all cells. Label A Label B Label C Label D A cell is labeled. The outside layer is labeled B. The inside is labeled D. Small dots are labeled C. A swirly structure is labeled A.
Answers
Answer:
Label A: DNA
Label B: cell membrane
Label C: ribosome
Label D: cytoplasm
Answer:
Label A: DNA
Label B: cell membrane
Label C: ribosome
Label D: cytoplasm
Explanation:
How does energy usually flow in ecosystems? A. from the Sun through producers to consumers B. from consumers through the Sun to producers C. from producers through the Sun to consumers D. from the Sun through consumers to producers
Answers
Answer:
A. from the Sun through producers to consumers.
How does the structure of the cell membrane help to enable its function
Answers
Answer:
The cell membrane gives the cell its structure and regulates the materials that enter and leave the cell. ... Instead, these molecules must pass through proteins that are embedded in the membrane. In this way, the cell can control the rate of diffusion of these substances.
Explanation: Hope this helped!!!!
Answer: The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
Explanation:
Why is it sometimes difficult to distinguish petals and sepals?
Answers
Answer:because of the color and shape
Explanation:
Which best describes the purpose of a fever?
to make the body too hot for the bacteria to live
to make the body too cold for the bacteria to live
to stimulate lymphocytes to make antibodies
to stimulate an increased production of sweat
Answers
The statement which best describes the purpose of a fever is that it stimulates lymphocytes to make antibodies. Thus, the correct option for this question is C.
What is Fever?Fever may be characterized as a type of circumstance in which the body temperature of an individual may rise as compared to the average temperature, i.e. 98.6°F (37°C).
You get a fever because your body is trying to kill the virus or bacteria that effectively caused the infection. Most of those bacteria and viruses do well when your body is at its normal temperature.
But if you have a fever, it is harder for them to survive. Fever also activates your body's immune system in a manner via stimulating lymphocytes to make antibodies.
Therefore, the correct option for this question is C.
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If photosynthesis and cellular respiration form a cycle, why do plants need to continually take in carbon dioxide,
oxygen, and water from the environment?
Answers
Answer:
The glucose(from cellular respiration) is turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
hope this helped :)
Explanation:
Answer:
Plants release excess oxygen, carbon dioxide, and water back into the environment. They don’t store them indefinitely. So, they continually need to take in these elements.
Explanation
have a good day!
Why is it important for the appendages of an arthropod to be jointed? The joints store water and prevent the animal from drying out. The joints make the appendages flexible and allow for movement. The joints house the sensory organs for each appendage. The joints expand and allow the exoskeleton to grow.
Answers
Answer:
B. The joints make the appendages flexible and allow for movement.
Explanation: