The right answer is the lobed body.
The name trilobite comes from the subdivision of the body into three longitudinal lobes:
A medial lobe, the rachis,
And two lateral lobes, the pleura.
There is also a subdivision into three regions from front to back: the cephalon ("head"), the thorax and the pygidium ("tail").
The number of spines is a trilobite characteristic that did not change over time, unlike the shape of their eyes or the number of body segments.
Explanation:Trilobites are an extinct group of marine arachnomorph arthropods. They are recognized by their characteristic 3-lobed, 3-segmented body structure. Although trilobites underwent numerous changes over time due to evolution, one characteristic that did not change was the number of spines. The number of spines remained consistent throughout the trilobite's existence. This is in contrast to other trilobite characteristics such as the shape of their eyes or the number of body segments, both of which evolved over time in response to changing environmental conditions.
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Of the following types of transport, which two may the cell utilize if a large molecule or organism cannot pass through the membrane?
active transport
passive transport
pinocytosis
facilitated diffusion
phagocytosis
Answer: Phagocytosis and pinocyotosis.
Explanation:
Endocytosis is a cellular process in which the substance are bought into the cell. It can be food, dissolved particles, damaged cell, et cetera.
It consists of pinocytosis and phagocytosis. The material that has to be ingested inside the cell is surrounded by the area of the cell membrane, which turns into a vesicle that contains the ingested material.
The Pinocytosis can be defined as cell drinking and phagocytosis can be defined as cell eating.
A species that is no longer in existence would best be characterized as which of the following?
threatened
endangered
extinct
dinosaurs
Answer:
Extinct.
Explanation:
The IUCN red list classifies the organism as endangered , extinct, threatened and vulnerable organism. The organism are classified on the basis of their number and presence on the particular area.
Extinct species is the species that are no longer present on the earth. The extinct species has been eliminated due to the unfavorable environmental condition and due to human activities. No single organism is present of the extinct species.
Thus, the correct answer is option (3).
Many types of scientific equipment are used to perform different functions in the science lab. Which of the following combinations of equipment would be needed to bring one liter of water to 85°C?
a.
graduated cylinder, balance, beaker and hot plate
b.
graduated cylinder, beaker, thermometer and hot plate
c.
test tube, thermometer, and Bunsen burner
d.
test tube, electronic balance and hot plate
Answer: Option B
Explanation: Graduated cylinder, beaker, thermometer and hot plate
A graduated cylinder is a equipment which has readings for the measurement of the liquids or substance s that is kept inside it.
Beaker is an equipment which is used to boil water in this case by keeping on the hot plate.
The hot plate is used to heat the substances kept on it. Thermometer is used to measure the temperature of the substance.
These equipment are used to heat one liter water and make its temperature 85°C.
Which of the following can impact the climate of an area based on its geographical relief, such as whether it is close to mountains or ocean?
A.latitude
B.elevation
C.winds
D.topography
Harmful particles and gases in the air are known as ____________________.
Answer: Pollutant
Explanation:
Any undesired particle that is present in the environment is known as pollutant. These can be particulate matter or harmful gases that is present in the atmosphere.
These gases can be carbon dioxide( more than normal), carbon monoxide, sulfur dioxide, et cetera. Pollutants can be pollen grains, dirt and smoke which pollutes the environment.
Hence, undesired particles are known as pollutants.
Vines growing up a wall is an example of _____.
phototropism
thigmotropism
gravitropism
hydrotropism
Vines growing up a wall is an example of thigmotropism.
What is thigmotropism?
Thigmotropism is the movement or change in orientation of a plant’s growth as a reaction to touch. The orienting factor is generally a hard surface that can change the direction of the plant’s growth or the growth of one of its organs.Thigmotropism can be in the form of opening or closing of parts of the plant such as the petals or leaves, the coiling of the plant around the surface, as well as other ways.
Why other options are incorrect?
Phototropism is incorrect as it relates to light.Gravitropism is incorrect as it relates to gravity.Hydrotropism is incorrect as it relates to water.Hence, vines shows movement it is an example of thigmotropism.
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A leaf in which small veins extend outward from a single main veins has what type of ventaion?
Digestion takes place inside blank containing blank
Digestion occurs inside organs that contain various enzymes. These enzymes, found in organs like the stomach and intestines, help break down food into nutrients. The enzymes lactase, maltase, and sucrase in the small intestines, for example, assist in the digestion of sugars.
Explanation:Digestion takes place inside structures called organs containing various enzymes. So, the full sentence should read: Digestion takes place inside organs containing enzymes. The digestive system, for instance, is made up of organs such as the stomach and intestines where enzymes break down food into nutrients. In the stomach, pepsin helps digest proteins, while in the small intestines, enzymes like lactase, maltase, and sucrase aid in the digestion of sugars.
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When a nerve impulse reaches the end of an axon, the neurons release ________________, chemicals that carries the signal across the synapse.
A. Action potential
B. Steriods
C. Neurotransmitters
Answer: The correct answer for the fill in the blank is- C) Neurotransmitters.
Neurotransmitters are the chemical messengers in the body that help in the transmission of signals from one neuron to another neuron across a gap called synapse ( such as neuromuscular junction).
These chemicals are released from synaptic vesicles that are present in the nerve endings and also from some glands (like adrenal gland and pituitary).
Example of neurotransmitters- Dopamine, acetylcholine, serotonin.
How can you use composition and texture to identify common rocks?
All of the following are true about science except
Answer
A. It reflects the personal opinions and beliefs of scientists.
B. It is developed using the inquiry and experimentation.
C. It is a body of knowledge about the world around us.
D. It changes over time when new discoveries are made.
Explain how independent assortment occurs in cells and explain its importance.
Answer: Independent Assortment is the second law of inheritance.
Traits are passed from parents to offspring independently of one another.
Independent assortment is random and occurs during Metaphase 1 of meiosis.
These are two possible alignments for the chromosomes.
Since the alignments are random and not assigned, genetic variation occurs.
Explanation: On Ed
Independent assortment occurs during meiosis when homologous chromosomes line up randomly, allowing for genetic variation. Recombination through crossover events further contributes to independent assortment. This ensures that alleles on a given chromosome are not always inherited together, promoting genetic diversity.
Explanation:Independent assortment occurs during meiosis when homologous chromosomes line up in random orientations during metaphase I. Each gamete can contain any combination of paternal and maternal chromosomes, resulting in genetic variation. Recombination through crossover events also contributes to independent assortment by exchanging genetic material on homologous chromosomes. This ensures that alleles on a given chromosome are not always inherited together, allowing for more genetic diversity.
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the primary function of the sensory division of the peripheral nervous system is to transmit impulses.
a. from sense organs to the central nervous system
b. from the spinal cord to the brain
c. from the brain to the muscles
d. from one sense organ to another
The answer is A, i took the course.
What happens to dna before cell division??
If an original cell has the genetic makeup AaSs. What would the genetic makeup of the daughter cells be?
The genetic makeup of the daughter cells can include AA, Aa, aA, or aa with each possibility occurring with a 25% chance.
Explanation:When an original cell has the genetic makeup AaSs, the genetic makeup of the daughter cells can vary. This is because during the formation of gametes (eggs or sperm), the alleles for each trait separate randomly, according to Mendel's principle of random segregation. Therefore, the possible genetic makeup of the daughter cells could include AA, Aa, aA (which is the same as Aa), or aa, with each possibility occurring with a 25% chance.
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What advantages does a skeleton made of cartilage offer the shark?
Which component of blood protects us from invading foreign material?
The components of blood that protect us from invading foreign materials are White Blood Cells, certain proteins in the plasma such as antibodies, antigens, and platelets.
Explanation:The component of blood that protects us from invading foreign material is primarily the White Blood Cells (WBCs), or leukocytes, as part of the immune response. WBCs identify and target invading bacteria, viruses, and other foreign organisms. Not only do they combat foreign invaders, but they also recycle waste components such as old Red Blood Cells.
In addition to WBCs, certain proteins in the plasma, such as antibodies and cytokines, defend the body against infection and other threats. For instance, when damage occurs to blood vessels resulting in bleeding, blood platelets and coagulation factors present in the plasma interact to seal the ruptured areas, preventing further blood loss and protecting the body.
Another important component, called antigens, triggers an immune response when foreign antigens appear in our blood. Proteins known as antibodies, produced by certain B lymphocytes called plasma cells, attach to these foreign antigens to neutralize them.
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How do small intestinal epithelial and root hair cells function in nutrient procurement?
In the small intestine, the epithelial cells of the villi, which are covered with microvilli, absorb water-soluble nutrients such as sugars and amino acids into the bloodstream, while fatty acids and fat-soluble vitamins are absorbed by lacteals into the lymphatic system. These structures increase the surface area for efficient nutrient uptake.
Explanation:Function of Small Intestinal Epithelial and Root Hair Cells in Nutrient ProcurementThe small intestine is where the majority of nutrient absorption occurs after the digestion of protein, fats, and carbohydrates. The inner surface of the small intestine contains many villi, which are finger-like projections, and the surface of these villi is covered with microvilli. This significantly increases the surface area for absorption, enhancing the efficiency of nutrient uptake. The epithelial cells lining the villi are responsible for transporting nutrients into the bloodstream and lymphatic system.
Each microvillus, as seen under a transmission electron microscope, is approximately 1 µm long and 0.1 µm in diameter. The core of these microvilli contains actin microfilaments, assisting in the absorption process. In the small intestine, water-soluble nutrients, such as simple sugars and amino acids, are absorbed directly into the capillary blood in the villi and then transported to the liver via the hepatic portal vein.
Conversely, fatty acids and fat-soluble vitamins are absorbed by lacteals, which are part of the lymphatic system within the villi. Root hair cells, while not covered in this question, have a similar absorptive role in plants, taking up water and nutrients from the soil.
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What is the definition of mitosis?
The creationist and evolutionist are in agreement on all of the following items except: cell complexity the role of certain organelles in cell chemistry the ability of matter to be self organizing the levels of organization of complex organisms
The creation-evolution controversy (also termed the creation vs. evolution discussion or the origins dispute) includes an ongoing, recurring cultural, political, and theological debate about the issues of the Earth, of humanity, and of other life. Within the Christian world, creationism was once widely considered to be true, but since the mid-19th-century evolution by natural choice has been verified as an empirical scientific fact.
Question:
The creationist and evolutionist are in agreement on all of the following items except:
• cell complexity
• the role of certain organelles in cell chemistry
• the ability of matter to be self organizing
• the levels of organization of complex organisms
Answer:
• the ability of matter to be self organizing
Explanation:
A creationist is a person who believes in the creation story. A creationist believes that life originated from a Creator( God) who made the heavens and the earth. A creationist believes God created human beings, fish, birds, and every other living organism on earth. This belief system is a religious belief.
An evolutionist believes in the the theory of evolution. An evolutionist believes that life develops millions of years ago due to the evolution of simple life forms present on earth.
A evolutionist believes that organisms evolves of change due to physical and behavioural characteristics that they inherited.
A creationist and an evolutionist disagree on the fact that matter is self organizing.
In what different ways did people live in ancient China?
Answer:
Most of the people in ancient China were peasants, that is, people who work on farms, both cultivating and raising cattle.
Explanation:
Ancient China was one of the oldest civilizations in the world with continuity until today, it has its origins in the Yellow River basin, where the first Xia, Shang and Zhou dynasties arose. The existence of written documents about 3,500 years ago has allowed the development in China of a very precise historiographic tradition, which offers a continuous narration from the first dynasties to the contemporary age. The Chinese culture, according to the myth, opens with the three original emperors: Fuxi, Shennong and finally the Yellow Emperor Huang, the latter considered the true creator of the culture. However, there are no historical records that demonstrate the real existence of these personalities, which according to the oral transmission from generation to generation, would have lived about 5000 to 6000 years ago.
The traditional Chinese storytelling is based on the so-called dynastic cycle, whereby historical events are explained as the result of successive dynasties of kings and emperors who go through alternate stages of boom and bust. This model of the dynastic cycle has been criticized by many authors1 for two fundamental reasons: First, for its simplicity, since the model adopts a recurring pattern according to which the first emperors are heroic and virtuous, while the latter are weak and corrupt This vision is undoubtedly influenced by the interpretation of the reigning dynasties themselves, which found in the degradation of the preceding dynasty a legitimation of their own rise to power. Second, the dynastic model has also been criticized for presenting an artificial nationalist vision, because what in an alternative interpretation could be seen as a succession of different states and civilizations in the same territory, appears as a mere alternation of government regimes in the unperturbed framework of a single national entity.
The MOST accurate way to determine the evolutionary relationship between two animals is through the examination of
Answer:
The MOST accurate way to determine the evolutionary relationship between two animals is through the examination of DNA.
Explanation:
The diversity of life forms on Earth originated from mutations selected by greater reproductive capacity over time. From the DNA of the original cell came the infinity of life forms with which we share the earth through the mechanisms of mutation and recombination.
Evolutionary history shows us how all living beings are more or less related to each other. Some percentages of similarity between the sequences of the human genome and other species are striking: we have 95% in common with chimpanzees, 89% with mice; 45% with fruit flies and up to 9% with Escherichia coli, the bacteria in our intestines. This similarity is an indication of the common origin of all living beings and enables the analysis of divergences from one species to another.
Scientists believe plant life moved from water to land and that plants evolved from multicellular _____.
plankton
green algae
protists
protozoa
Dolly, a female domestic sheep, was the first mammal to be cloned from a fully differentiated cell, using the process of nuclear transfer the nucleus of a _____________ is transferred into a cytoplasmic donor.
what are some important reasons for studying biology
What are some safety concerns for students working in the lab?
An experiment in which only one variable is changed is a(an) __________ experiment.
A. randomized
B. natural
C. double blind
D. controlled
Answer;
D. controlled
An experiment in which only one variable is changed is a controlled experiment.
Explanation;
-A control experiment is an experiment where the researcher only changes one variable at a time in order to isolate the results.
In a controlled experiment, most conditions are constrained so that they do not change. One or two other conditions are then changed and measured by the experimenter. These are known as the independent variables.
For example; An experiment where all subjects involved in the experiment are treated exactly the same except for one deviation.
An experiment that is only one variable that has changed is a controlled variable experiment.
the independent/controlled variable
is a variable that can be changed according to the purpose of the experiment
Further explanation
The development of chemistry begins with experiments that consist of chemical stages/processes. This method is a form of the scientific method that is commonly used by scientists in carrying out experiments.
Several experiments, trials, and errors will be carried out to test the hypothesis until the expected results are in the predetermined problem at the outset.
Variables, which can be determined in 2:
1. independent variable, which is a variable that can be changed according to the purpose of the experiment
2. fixed variable, i.e. variable whose value is constant and observed to determine changes in independent variablesWe can control independent variables according to the results of the experiments to find conditions that have the most optimal results so that the goals of the problems that have been set will be achieved.
The continuous investigation is so that the control variables are not out of the problem boundary
So the right choice is a controlled variable
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Keywords: scientific method, fixed variable, an independent variable
what are 4 phrases describing osmosis
Answer
The phrases would be;
-A passive transport
-Movement of water molecules
-Through a semipermeable membrane
-From a higher concentration to a lower concentration
Explanation;Osmosis is the process by which water moves from its higher concentration to a region of its lower concentration through a semipermeable membrane. Osmosis is an example of passive transport, since it does not require energy like the case of active transport.For example, when a cell is put in a hypotonic solution, a solution with more solvent concentration, the cells absorbs water from the solution through osmosis and increases in size.Describe two themes that connect all the information in biology. use an example to help explain the theme
Answer:
Two themes that connect all the information in biology are structure and function.
Explanation:
In word Biology, bio means life and logy means study. The study of life is Biology. The study involves structure and function features of living things. The structure and function tells us about the interaction of living organisms with the environment. For example, the large organisms have small surface area and small organisms have large surface area. This helps in heat lost or conservation.
Which is NOT a function of blood? a. carrying oxygen from the cells to the lungs c. transport nutrients to the cells b. transporting waste to the kidneys d. carrying cells and molecules to fight infection
The function that is NOT assigned to blood is carrying oxygen from the cells to the lungs. The actual task of blood includes transporting oxygen from the lungs to the cells, nutrients from the digestive system to the cells, carrying waste to the kidneys, and transporting cells, molecules to fight infections.
Explanation:The function of blood in the body is not to carry oxygen from the cells to the lungs. Instead, one of the primary roles of blood is its responsibility to transport oxygen from the lungs to the various cells throughout the body. In addition to carrying oxygen, our blood carries numerous other essential substances.
These include nutrients (which are transported from the digestive system to other areas of the body), waste products
(which are moved to the kidneys for removal), and cells, molecules, and antibodies that help our bodies to fight off infection and heal from injuries.
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