The answer is (d.) Some scientists believe that prions, tiny proteins much smaller than a cell, that can replicate themselves may be living organisms.
Prions are like viruses, they are not alive making statement B to be true. Prions lack the ability to grow and reproduce. they are dependent on the living cells to replicate. Statement A is absolutely correct while Statement C is somehow wrong. According to scientists, the accurate count of cells in a human is 37.2 Trillion.
Polygenic traits are those traits that are controlled by more than one gene. Such traits may even be controlled by genes located on entirely different chromosomes. Human height, eye and hair color are examples of polygenic traits. Skin color is another polygenic trait for humans and a variety of other animals.
A. Osmosis has to occur through a semi-permeable membrane whereas diffusion can occur through any concentration gradient.
B is incorrect because net movement of osmosis is from area of low concentration to area of high concentration.
C is incorrect because both diffusion and osmosis is a form of passive transport
D is incorrect because the descriptions of osmosis and diffusion are swapped
A trophic pyramid is a visual representation of the trophic levels in an ecosystem, with the producers at the base of the pyramid and the tertiary consumers at the top.
The pyramid would look as follows:
This means that they would match as follows:
• Producers, - Bottom of the pyramid ,(E),
• Primary Consumers, - Second level from the bottom (A)
• Secondary Consumers - Middle of the pyramid (C)
,
• Tertiary Consumers - Second level from the top (D)
,
• Apex Predator - Top of the pyramid (B)
Answer:
<u>Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream.</u>
Explanation:
according to wikipedia!
