Answer:
Either B) increased parasympathetic stimulation of the heart. OR D) Constriction of elastic arteries to maintain blood pressure. I'm leaning more towards D) constriction of elastic arteries to maintain blood pressure.
Answer:
Due to presence at early days of the planet.
Explanation:
We only find the remains of single celled organisms in the oldest fossils because the single celled organisms are the organisms that were present in the early days of this planet. These single celled microbes were present about 3.7 billion years ago while on the other hand, the oldest rocks are only a little older i. e. 3.8 billion years so these single celled organisms are considered as oldest fossils on this planet.
Explanation:
Risks:
may lead to a lack of variety in plant or animal species
The nutritional value of foods can be less
Benefits:
faster than natural selection
More selective breeds / Types
Answer:
Yes.
Explanation:
Cell division & differentiation also happens in animals and plants, and is not limited to just human beings.