Down syndrome is the result of an extra chromosome 21 in a gamete. What caused this to happen?

nondisjunction

telomeres

environment

chromosome inactivation

As the difference in concentration between two areas increase does diffusion increase or decrease?

Which of the following is not an example of a molecule? NCI3, O3, F, H2O2

How many possible genetic combinations can arise from meiosis?

If the diploid number in a liver cell is 52, how many chromosomes are there is the egg of this organism?

What is the name of the process in which an arthropod sheds its exoskeleton and forms a new one? incomplete metamorphosis secretion molting complete metamorphosis

Find the common radio of the sequence. - 4,8,-16,32,

Grandpa Sam used to tell his grandkids how he first laid eyes on Grandma Sylvia. "When I was courting your granny, I was dazzled by her beautiful, LONG eyelashes. What a looker she was." "Yes, and a handsome man he was too," said Grandma Sylvia.

Jim is categorized as poor. Thus Jim's daily income must be less than how much dollars? Jim must be earning less than dollars per day.

Why does blood pressure decrease as the blood travels from arteriesto arterioles to capillaries?

Kangaroos that nurse their young in a pouch are what type of mammal? monotreme marsupial placental mammal