6. Which of these is produced as a result of
fertilization?
A.
a zygote with twice the number of
chromosomes as a gamete
B.
an egg with half the number of
chromosomes as a zygote
a gamete with twice the number of
chromosomes as a zygote
C.
D. a zygote with half the number of
chromosomes as a gamete

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

What is thought to have caused the mass extinction at the end of the cretaceous period?