Answer:
proteins
Explanation:
All living organisms are dependent on three essential biopolymers for their biological functions: DNA, RNA and proteins. Each of these molecules is required for life since each plays a distinct, indispensable role in the cell. The simple summary is that DNA makes RNA, and then RNA makes proteins.
Answer:
The correct answer is - muscle soreness and overexertion.
Explanation:
When an individual does strenuous physical activity such as heavy weight lifting, muscles of the body extend and contract to support the pressure and movement.
Such weight lifting or physical activity repeatedly and for prolonged, time can overexert the muscles and muscle soreness with pain in the muscle. After resting muscle relaxed again and breathing helps in providing oxygen to muscles for aerobic respiration for more energy.
Answer:
Sexual reproduction results in genetic variation and asexual reproduction does not.
Explanation:
The key difference between sexual and asexual reproduction is that sexual reproduction occurs between two parents while asexual reproduction occurs via a single parent. Asexual reproduction requires only a single divisible cell to produce a new organism, whereas sexual reproduction requires two gametes, their formation and fusion.
Your teacher likes to copy. Found this at https://examples.yourdictionary.com/examples-of-keystone-species.html
Grizzly bears: As predators, bears keep down the numbers of several species, like moose and elk. They also carry and deposit seeds throughout the ecosystem. Bears that eat salmon will leave their dropping and the partially eaten remains that provide nutrients such as sulfur, nitrogen and carbon to the soil.