What does an organism's phenotype describe?

A. the allele combination for a trait

B. the physical appearance of a trait

C. the number of alleles on a gene

D. the number of different traits inherited

When a female bird prefers to reproduce with males that have longer tail feathers, this is called?

What microscope do you use to examine the internal structure of a nucleolus?

Explain how digestion takes place in the ruminant (cow)

Various procedures can be used to detect genetic disorders before birth. Among the tests discussed in this chapter, which is the least invasive (list first), and which two allow the chromosomes of the fetus to be examined? See Concept 14.4 (Page)

3) Two parts hydrogen and one part oxygen, this polar molecule is responsible for life on earth.

Which of the following is an example of an organism maintaining homeostasis? 1. A cat grooming itself 2. A bear nursing her cubs 3. A man sweating while he runs 4. A boy riding a bike

Which of the following is the era in which we now live? Mesozoic Phanerozoic Cenozoic Paleozoic

Adenine pairs with what

Trees take carbon dioxide out of the air and convert it to oxygen, so the government funds a tree-planting initiative by offering $300 to any citizen who plants a tree.

How many cells does a unicelullar living organism have