Why do some red blood cells undergo programmed death? They are healthy. The body must balance the blood cell count. Their concentration is too low. There is too much oxygen in the blood.

What types of mutations adds material to the genome?

Which of the following types of algae shows a distinct alternation of generations? A) Chlorophytes B) Phaeophytes . C) Chrysophytes

A man who is color-blind marries a woman who is not color-blind and is not a carrier of the allele for color blindness. Create a Punnett square to predict the possible genotypes of their children.

Which of these is true of meiosis? A. n 2n B. 2n n C. 2n 2n D. n n

What is immigration? A. When animals are bom in an ecosystem B. When animals die in an ecosystem C. When animals move into an ecosystem D. When animals leave an ecosystem

Is a fossil still a fossil if it is preserved artificially? For example, (Is a mummy a fossil even though it was preserved by people?)

Which type of macromolecule is the quickest source of energy for the body

Which two structures contain DNA

When reproduction is achieved through meiosis and subsequent fertilization it is called?

Which statement is correct? A. Both plants and fungi undergo photosynthesis. B. Both protists and fungi are eukaryotic. C. Like some prokaryotes, fungi are autotrophic. D. Both animals and fungi lack cell walls.