the answer is B I believe
The right answer is B) homozygous dominant
We speak of homo / heterozygosity about a locus, that can be represented by several alleles (version). The alleles are dominant or recessive between them.
*So homozygote: same alleles
*heterozygote: different alleles
Consider a locus and 2 alleles:
allele R: dominant
allele r: recessively
*heterozygote: R / r
*homozygous recessive: r / r
*homozygous dominant: R / R
What is a solar eclipse? (4 points)
A. A solar eclipse is when the moon and the sun are on opposite sides of the Earth.
B. solar eclipse is when the moon is on the far side of the sun.
C. solar eclipse is when the moon blocks the sun's rays from reaching the Earth.
D. A solar eclipse is when anything blocks the sun's rays from reaching the Earth.
A solar eclipse is when the Moon blocks the Sun's rays from reaching the Earth. The Moon must be precisely aligned with the Sun and Earth. There are total and partial solar eclipses, depending on whether the Moon's shadow completely or only partially blocks the Sun.
A solar eclipse occurs when the Moon moves between the Sun and Earth, casting a shadow on Earth, and temporarily blocking the Sun's rays from reaching Earth. The correct answer to the student's question is (C). A solar eclipse is when the moon blocks the sun's rays from reaching the Earth. During a total solar eclipse, the Moon's umbra (the darkest part of its shadow) intersects with Earth's surface and completely obscures the Sun's light from view in a small area, allowing observers to see the Sun's corona. If only part of the Sun is covered, resulting in some sunlight still reaching Earth, it is called a partial solar eclipse. Solar eclipses are relatively rare because they require the Sun, Moon, and Earth to be precisely aligned in the same plane, known as the ecliptic.
ILL GIVE BRAINLIEST TO WHO IS CORRECT!!
Which of the following is not learned from studying fossils?
If an animal ate meat or plants
How species changed in the past
How large extinct animals were
What types of species will evolve in the future
Answer:
What types of species will evolve in the future
Explanation:
This would only be solved by time as the word future means it can not have been discovered they can make hypotheses but that is not facts
If a star is considered medium sized it is
about the size of our sun
about half of the size of our sun
about twice the size of our sun
at least five times the size of our sun
Final answer:
A medium-sized star is about the size of our Sun, which is approximately 1.4 million kilometers in diameter. Most nearby stars are of similar size, and the Sun is brighter and more massive than about 80% of the stars in the Galaxy.
Explanation:
When considering the size of a medium-sized star, one can generally refer to a star that is about the size of our Sun. The Sun itself has a diameter of approximately 1.4 million kilometers. Most nearby stars have typical diameters around this scale, fitting the definition of a medium-sized star. However, there is a diverse range of star sizes, with some much smaller and others much larger than our Sun.
Various measurements and observations indicate that while there are exceptions, a significant number of stars fall within the spectrum of being medium-sized, implying sizes that are quite similar to our Sun. Stars significantly more massive than the Sun are quite rare within our local cosmic neighborhood; within 30 light-years of the Sun, none exceeds four times the mass of the Sun.
The Sun is also more massive than most of the stars in our vicinity, being brighter than about 80% of the stars in the Galaxy, further underscoring its qualification as a medium-sized star. Therefore, when referencing a medium-sized star, the size of our Sun serves as an apt comparison.
List two important groups of organisms that appeared during each of the three most recent geologic eras
what is the tarsals function?
The tarsals are seven bones in the ankle that transmit body weight from the tibia and fibula to the foot. They play a crucial role in balance, shock absorption, and efficient movement. Key tarsal bones include the talus, calcaneus, navicular, cuboid, and three cuneiforms.
Function of the Tarsals
The tarsals are the seven bones that make up the ankle. The ankle's primary function is to transmit the weight of the body from the tibia and fibula to the foot. The seven tarsal bones include the talus, calcaneus, navicular, cuboid, and three cuneiform bones.
The talus articulates with the tibia and fibula superiorly, forming a joint that allows for the up-and-down motion of the foot. The calcaneus, or heel bone, is the largest of the tarsals and supports much of the body's weight when standing or walking.
The other tarsal bones (navicular, cuboid, and three cuneiforms) help to form and support the arch of the foot, which provides additional shock absorption and aids in the ability to move efficiently and maintain balance. This arch is crucial for activities like walking, running, and jumping.
all the following are greenhouses gases expect ?
a.water vapor
b.carbon dixiode
.c methane
d.oxygen
If a sea star egg is taken from the ocean and put into Elk lake would you expect the egg to shrink, swell, or stay the same, why do you think that?
A sea star egg transferred from the ocean to a freshwater environment, such as Elk Lake, is likely to swell due to lower salinity, resulting in osmosis where water moves into the egg to balance the solute concentrations. The sensitivity of sea star eggs to their environment makes them susceptible to these changes, which could impact their development.
If a sea star egg is transferred from the ocean to Elk Lake, we can anticipate that the egg might either shrink or swell depending on the salinity differences between the ocean and the lake. Sea water is typically saltier than lake water. This difference in salinity can cause osmosis, which is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. Consequently, if Elk Lake has a lower salinity compared to the ocean, the sea star egg would likely swell as water enters to balance the internal and external solute concentration. Conversely, if Elk Lake is saltier, the egg might shrink as water exits the egg to balance the solute concentration. However, considering that most lakes are less salty than oceans, the more common scenario would be for the egg to swell. It is essential for the sea star's development that it is in an environment similar to its natural habitat.
Moreover, the phenomenon where sea stars can reproduce from fragments, known as fragmentation, implies that sea star eggs are sensitive to their environment and that the parent organism may employ certain strategies to protect its offspring from unfavorable conditions such as enclosing the egg in an isotonic fluid. Thus, introducing a sea star egg into a new environment is complex and fraught with challenges, potentially leading to detrimental effects on the egg's capacity to develop properly.
Which statement about this parallelogram and rhombus is true? A. Both have 2 pairs of parallel sides, but the parallelogram has 2 pairs of congruent sides and the rhombus has 4 congruent sides. B. Both have 2 pairs of parallel sides, but the rhombus has 2 pairs of congruent sides and the paralleogram has 4 congruent sides. C. Both have 4 congruent angles, but the parallelogram has 2 pairs of congruent sides and the rhombus has 4 congruent sides. D. Both have 4 congruent angles, but the rhombus has 2 pairs of congruent sides and the quadrilateral has 4 congruent sides.
Answer:
a or d
Explanation:
Choose the correct order of events in the Kreb's cycle:
Citric acid is formed, 4-carbon molecule rearranged, pyruvate is split
Pyruvate is split, citric acid is formed, coenzyme A is added
Pyruvate is split, citric acid is formed, 4 carbon molecule rearranged
Coenzyme A is added, pyruvate is split, citric acid is formed
The correct sequence in the Krebs cycle is adding Coenzyme A to pyruvate, splitting the pyruvate to form acetyl CoA, then combining acetyl CoA with oxaloacetate to form citric acid.
Explanation:The correct order of events in Kreb's cycle is: Coenzyme A is added, pyruvate is split, and citric acid is formed. This sequence can be defined through the following steps:
Pyruvate, produced from glycolysis, enters the mitochondrial matrix.Pyruvate is converted into a two-carbon acetyl coenzyme A (acetyl CoA) molecule by the enzyme pyruvate dehydrogenase. This process involves the addition of coenzyme A to pyruvate, releasing a molecule of carbon dioxide.Acetyl CoA then enters the Krebs cycle by combining with a four-carbon molecule, oxaloacetate, to form a six-carbon citrate molecule, also known as citric acid.Citric acid goes through a series of reactions that reorganize and oxidize it, eventually regenerating oxaloacetate and producing ATP, NADH, and FADH2.Therefore, the statement 'Coenzyme A is added, pyruvate is split, citric acid is formed' is the correct order of events at the beginning of the Krebs cycle.
Final answer:
The correct sequence for the Krebs cycle begins with coenzyme A being added to pyruvate, then pyruvate splitting to form acetyl CoA, and finally, the acetyl CoA combining with oxaloacetate to form citric acid.
Explanation:
The correct order of events in the Krebs cycle is as follows:
Coenzyme A is added to pyruvate, which is split apart, forming a two-carbon acetyl CoA molecule and releasing carbon dioxide.The acetyl CoA molecule enters the Krebs cycle by combining with a four-carbon molecule, oxaloacetate, to form a six-carbon molecule called citric acid (citrate).The citric acid is then rearranged and oxidized, which leads to the production of NADH, and through a series of further reactions within the cycle, more NADH, FADH2, and ATP are produced.The step of the acetyl CoA combining with oxaloacetate to form citric acid is crucial because it initiates the citric acid cycle, and the combined molecule then undergoes the series of chemical transformations in the cycle.
Therefore, the option 'Coenzyme A is added, pyruvate is split, citric acid is formed' is the correct order of events in the Krebs cycle.
Explain why cells are so small
Why are pressurized seeds and spores a beneficial adaptation for these plants and fungi?
Fungi and plants are reproducing organisms, which transmit the genetic information from the parent to offspring meiotically or mitotically.
How are pressurized seeds and spores beneficial for fungi?
The spores are the microscopic reproducing agents of the fungi. These spores can be mitotically or meiotically produced depending on the environmental conditions. The spores are burst open in the environment to reach far distances so that they can avoid any competition for resources and light. For instance, if a horse feeds on the spores, the life cycle of the fungi is continued.
Thus, the spores are the reproductive agents of fungi that help in the survival of fungi in different environmental conditions.
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Photosynthesis. We know several things about this process. First, it is driven by light, usually sunlight. It is preformed by autotrophs in an ecosystem, and we usually think of plants in this regard. Now think of Earth as a closed system to energy. Sunlight reaches both sides of the lake in this picture but under different circumstances. On the left, there are dark clouds and rain, water in the atmosphere. On the right, it is sunny with cumulous clouds that are not rain clouds or dark
*will mark brainliest* Based on the structure, which material will dissolve this biomolecule the BEST?
The owner of a building needs to remove several shingles. Instead of lifting the shingles up by hand, he decides to use a long crowbar as a lever to lift them. By using this simple machine, the man is the amount of force needed to do the job, and he is the distance over which the force is applied.
Answer: decreasing; increasing
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Which is evidence that supports the dynamo theory
Answer: The earth's core is dominantly composed of nickel and iron. Outer core is liquid and inner core is solid.
The liquid present in the outer core moves continuously over the much denser solid inner core, acting as electrically conductive medium. Due to this a magnetic field is produced, which develops a magnetosphere that obstructs the incoming solar radiations from the sun.
Thus the outer liquid core helps us in understanding the dynamo theory.
Where does the assembly of ribosomes begin?
Answer: Ribosome assembly begins in the nucleolus a structure deep inside the cell's nucleus. The nucleolus is where ribosomal proteins combine with four rRNA strands to create the two ribosomal subunits that make up the completed ribosome.
Explanation:
Which phrase best describes osmosis? A. the movement of molecules from an area of low concentration to an area of high concentration B. the movement of water molecules across a selectively permeable membrane C. the process of synthesizing DNA D. the physical process where the cytoplasm divides
Why did Mendeleev leave blank spaces in his version of the periodic table? A. Mendeleev’s periodic table arranged elements in order of increasing atomic mass; spaces were left for elements not having the correct atomic mass. B. Mendeleev’s periodic table arranged elements in groups of similar chemical properties; spaces were left for elements not having a similar chemical property. C. Mendeleev’s periodic table arranged elements in order of increasing atomic mass; it was noticed that chemical properties repeated. D. Mendeleev predicted an element had not been discovered to fit the space.
Answer:
the answer is D
Explanation:
Mendeleev left blank spaces in his version of the periodic table for elements he predicted would be discovered, based on the periodic trends and properties of known elements.
Explanation:Dmitri Mendeleev, a Russian chemist, created his version of the periodic table by organizing elements by increasing atomic mass. However, he intentionally left blank spaces for undiscovered elements that he predicted would fill those gaps. This insightful approach allowed the inclusion of elements that were not yet known, but could be predicted to exist based on the periodic trends he observed in the properties of the elements that were already discovered. Answer D correctly reflects Mendeleev's reasoning: he believed that the periodicity of the table suggested the existence of elements that would be discovered to fit these gaps, and he made predictions about their properties.
An __________ ___________ is a group of organs which work together to carry out particular vital tasks within in an organism.
Answer:
organ system
Explanation:
An example of an organ system is the digestive system which is made of multiple organs such as the mouth, stomach, iliuem, deodenum, rectum, anus etc which are all working together to ingest food, break it down into soluble nutrients and eject undigested food.
What are three drawbacks of alternative sources of fossil fuels?
. Which of the following supports the theory of endosymbiosis? a. Mitochondria and chloroplasts contain their own set of DNA b. Prokaryotes are bigger than eukaryotes c,Mitochondria and chloroplasts do not contain their own set of DNA d.Prokaryotes and eukaryotes are often found living away from each other
Answer: a. Mitochondria and chloroplasts contain their own set of DNA.
Explanation:
The theory of endosymbiosis suggests that origin of mitochondria and chloroplast in eukaryotes were the individual primitive prokaryotic organisms. The mitochondrial and chloroplast DNA and protein synthesis was found similar to the bacteria. This provided the evidence for endosymbiotic hypothesis. It was determined that chloroplast as well as mitochondria divide independently in the cell where they live just like individual bacterial cell.
How does the structure of a red blood cell help carry out it’s function?
Red blood cells' structure, having a biconcave shape and lacking organelles, maximize their capacity to transport gases. Hemoglobin within these cells bind and transport oxygen and carbon dioxide. Their structural adaptations, like lacking mitochondria, enhances oxygen transport efficiency.
Explanation:The unique structure of a red blood cell enables it to efficiently carry out its primary function, which is gas transport. Red blood cells, also known as erythrocytes, are biconcave discs. This shape provides a greater surface area to volume ratio, which facilitates efficient exchange of oxygen and carbon dioxide.
Erythrocytes are packed with an iron-containing protein called hemoglobin. Each molecule of hemoglobin can bind with four molecules of oxygen, allowing each red blood cell to carry approximately a billion molecules of oxygen. Hemoglobin also helps in carbon dioxide transport.
Red blood cells lack most organelles, providing more room for hemoglobin molecules. Moreover, they lack mitochondria which prevents the use of the carried oxygen for metabolic respiration. These structural adaptations enhance the efficiency of oxygen transport.
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Help plz!!!ASAP and do i have 7 right
Water (H2O) Is composed of the same elements as hydrogen (H2O2) How do their properties compare
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1. What types of geological events or changes occur at divergent plate boundaries?
2. What types of geological events or changes occur at convergent plate boundaries?
3. What types of geological events or changes occur at transform plate boundaries?
4. Explain how these geological processes and interactions have changed Earth's surface through the years. Be sure to use evidence to support your answer.
Give an example of how the environment can influence the way genes are expressed in a plant.
Genes are the hereditary unit, which transmits the genetic information from the parent to the offspring. Human-made and environmental factors can influence the expression of genes.
How are genes influenced by environmental factors?The environment factors such as temperature, sunlight, oxygen levels, precipitation, and diet can influence the genetic expression in plants. For instance, sunlight is necessary for plants to carry out photosynthesis. The chloroplasts are the site, where light energy is converted into chemical energy. The presence of green color pigment is synthesized when the sunlight hits the chloroplasts, thus, the absence or intensity of light will control the expression of chlorophyll.Thus, environmental factors such as sunlight, water, temperature, and oxygen level influence the genetic expression in organisms.
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What is a vitamin C deficiency?
The ions in a compound form and orderly three-dimensional arrangement called a molecule. true or false
How is a lily leaf cell different from a cats skin cell
how is the inheritance pattern between parents and offspring represented diagrammatically