Explain why the number of squid might change if there were a significant decrease in the number of cod

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants,the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important