Animals can be classified into two main groups:vertebrates and invertebrates<span>. The main difference between </span>vertebrates and invertebrates<span> is that</span>invertebrates<span>, like insects and flatworms, </span>do<span> not</span>have<span> a backbone or a spinal column. Examples of</span>vertebrates<span> include humans, birds, and snakes. hope this helped</span>
Answer:
Hayflick limit
Explanation:
The Hayflick limit, or Hayflick phenomenon, is the number of times a normal human cell population will divide before cell division stops. It was postulated by Leonard Hayflick in 1961,
<span>Distance has a huge influence on a planet's average surface temperature. So the answer is A. </span><span>Planet B is expected to be cooler than Planet A.</span>
I think it's c but I'm not 100% sure
A seems incorrect
bcz from virus to mammals everyone have dna if im not wrong
