Which are sources of adult stem cells? Check all that apply.

1. bone marrow

2. amniotic fluid

3. brain

4. gametes

5. liver

6. embryo

Why does a coastal area have less variation in temperature than a noncoastal area?

identify the transformation of energy that takes place in the diagram. The girl eats corn to have energy to ride a bike

Which enzyme is used by rna viruses to directly replicate the viral rna genome?

Walter conducts an experiment with pea plants. He crosses two hybrids (Yy). If the cross produces 100 offspring, how many will be homozygous? 25 50 75 100

How are three different types of consumers alike and how are they different

Which best describes a difference between cloning plants and selectively breeding plants? A. Cloning requires two parents and selective breeding requires one parent. B. Cloning results in a genetically identical plant and selective breeding does not.

A cook adds oil to vinegar and then mixes it to make a sald dressing. Is this a physical change? Why or why not?

Fossilized evidence of Earth's first forms of life would consist of a. vertebrates from the Precambrian b. invertebrates from the Precambrian c. eukaryotes from the Precambrian d. prokaryotes from the Precambrian

A) Chromosomes pair in step 2. B) Chromatids separate in step 5. C) Chromosomes are replicated in step 1. D) Chromosomes exchange genetic material in step 3.

The climate with which the monsoon forest is best associated with is