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

nondisjunction

telomeres

environment

chromosome inactivation

Does euglena have tinsel or whip lash flagellum

The medicare prospective payment system for reimbursing hospitals utilizes:

How does the law of conservation of mass apply to this reaction: C2H4 + 3O2 - -> 2H2O + 2CO2? A. Only the oxygen needs to be balanced B. The equation needs to be balanced. There are fewer oxygen atoms in the equation than hydrogen and carbon C.

Which process contributes to the formation of ground water

The four main types of carbon based molecules in organisms are carbohydrates, lipids, nucleus acids and

Why do all organisms take in matter and rearrange atoms through chemical reactions to form molecules essential for life?

A biologist counts the number of zebras in a population each year and notices an increase in the zebra population. Which describes the biologist's actions? experimentation inference observation interacting

Which is one of the seven characteristics that Mendel observed in pea plants? flower size seed texture leaf shape stem color

When enough experimental data support a hypothesis, the hypothesis becomes a what

Ezpz escape answer key station 1 cells