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Alecsey [184]
2 years ago
14

What's the primary reason that mammals and avian dinosaurs thrived in the Paleogene period? A. Plants developed as the main food

source for these heterotrophic organisms. B. Their predators had been killed off by the Permian extinction. C. Their predators had been killed off by the Cretaceous-Paleogene extinction. D. The earth significantly warmed, and cold-blooded animals couldn't survive.
Biology
2 answers:
antoniya [11.8K]2 years ago
4 0

Answer:

I think that it might be A

Explanation:

Inessa05 [86]2 years ago
3 0

Answer:

The correct answer is option B, that is, their predators had been killed off by the Permian extinction.

Explanation:

The avian dinosaurs and the mammals were small creatures, living under the pump of the dinosaurs that reign the world, however, also were ceasing the further enhancement in the development and the size of these species. At the termination of the Cretaceous era, due to the colliding of an asteroid on the Earth, all the dinosaurs got wiped out from the Earth's surface, with the only remaining one of the species of dinosaurs were the small avian species.  

Due to the opening of lots of niches, the avian dinosaurs and the mammals briskly began to diversify, evolve, and become much bigger in size. The mammals won the race for supremacy and they became the most prevailing species on the Earth.  

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If the NDU gene is amplified inside cells leading to overexpression of the protein, what event is likely to occur under hypoxic
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Answer: Oxygen consumption within the mitochondria will decrease further

Explanation:

If the NDU gene is amplified inside cells leading to overexpression of the protein, the event that is likely to occur under hypoxic conditions is Oxygen consumption within the mitochondria will decrease further

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Protist taxonomy has changed greatly in recent years as relationships have been re-examined using newer approaches. How do newer
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Answer:

The protists refer to the unicellular eukaryotic species, which comprise algae, fungi, and protozoa. Of these some are autotrophs and some are heterotrophs. They exhibit the tendency to survive in aquatic surroundings because of their feeding habits.  

In older approaches, protists are categorized on the basis of their morphology. However, by using novel approaches like molecular genetics, they are being categorized on the basis of their genetics.  

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2 years ago
A ________ zone is the place where two lithospheric plates converge, one riding over the other. Most volcanoes on land occur par
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Tha answer is D)

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8 0
2 years ago
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Flour, water, salt, and yeast are mixed, given time to react, and then baked. The product is a brown loaf of bread with many tin
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There is a difference in color between the reactants and the product. Also, a gas and a solid bread loaf were produced, compared to the liquid or powder forms of the reactants.

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Rosa eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Rosa plans to
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Answer:

<em><u>What does she need from the food she ate and the air she breathes so that she can go on her run? </u></em>

A. Rosa needs carbohydrates rich food (bread) to carry out her jogging activity. Protein-rich food before exercise is not recommended unless she is on a weight loss program (diet plan).

B. Rosa needs oxygen to perform aerobic respiration, which is required for maximum release of energy (36 molecules per reaction run). Anaerobic reactions yield less energy (2 molecules of ATP per reaction run) and are not recommended.

<em><u>How do Rosa's body systems work together to get the molecules she needs into her cells?</u></em>

Rosa's body cells need carbohydrates (glucose) and oxygen to perform aerobic respiration for the release of maximum energy. The glucose and oxygen molecules are provided to the cells via diffusion into the bloodstream. During exercise/jogging, complex molecules of carbohydrates such as starch (present in bread) are broken down into simple molecules (glucose) which are diffused into the blood. Likewise, a high amount of oxygen is provided to the body's cells via diffusion in blood, which is carried out by the faster movement of lungs and heart. The combined action results in the supply of both types of molecules to enter the cell where mitochondria use these substrates to produce energy molecules (ATPs).

<em><u>How do hair cells use these molecules to release energy for her body to run?</u></em>

The substrates (glucose and oxygen) enters the bloodstream and then taken up to the cell. Then they are provided to the mitochondria for the release of energy in the form of ATP. This is why mitochondria are known as the powerhouse of the cells. Within the cell, energy is released in a three-step process, i.e. glycolysis, the Krebs cycle, and oxidative phosphorylation. Here glucose reacts with oxygen. In the end, aerobic respiration per reaction run produces 36 molecules of ATP which are sufficient to meet intensive energy needs. During excrcise, the supply of oxygen and glucose is also faster due to faster lungs and heart actions.

PS: Anaerobic respiration cannot meet energy demands faster because the reaction produces only 2 ATP molecules per reaction run.

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