In a population of 1000 flowers there are two possible alleles for flower color, one dominant and one recessive. 400 plants are homozygous dominant, 200 plants are heterozygous, and 400 plants are homozygous recessive. How many dominant alleles are in the gene pool?

In order for traits to be heritable they must exist in ______.

Remnants of a pelvic girdle and hind limb bones can still be found in the skeleton of a modern snake. Darwin explains that these organs have become vestigial because

True or false? Evolution of behavior may have a genetic component.

Restriction enzymes function by locating sequences of DNA known as recognition sites which identify locations where DNA will be cut. Each restriction enzyme has a unique recognition site. The recognition site of the restriction enzyme Taq I (Thermus aquaticus) is: 5′ —T C G A — 3′ How many recognition sites does this DNA sequence contain? 5′ — T A C A T G T C G A A A A T C G C G T A T C G A C C C G A T G C T A C A T C G A T  — 3′

The most useful bacterial plasmids for creating recombinant DNA have which specific regions? (check all that apply)

True or false? Both plants and animals can have an internal 24-hour rhythm called a circadian rhythm.

Which of the following defines directional selection?

What is the best manipulation to undertake to achieve the goal of increasing the carrying capacity of a population of native (wild) plants in a given area (for example, a grassland habitat)?

According to Darwin, the most crucial factor in evolution is ______.