It means that the atom or the group of atoms became positive ion by losing two electrons Ex.
Answer:
option B
Explanation:
there are 22 pair of autosome and 2 pair of sex chromosome
Answer:
Coelenterates are the first invertebrates to develop a true nervous system.
Answer:
You answer is a) Food webs contain many different, linked food chains.
Explanation:
A food chain only follows just one path as animals find food. eg: A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass. A food web shows the many different paths plants and animals are connected.And so on for all the other animals in the food chain.
Evolution: Organisms that change throughout time
Natural Selection: Describes how and why the change occurs
