In January, a small number of Eastern Cottontail Rabbits were introduced into Red Forest. The population curve of the rabbits is shown below.In January, a small number of Eastern Cottontail Rabbits were introduced into Red Forest. The population curve of the rabbits is shown below.
According to the graph, the population of the rabbits increased rapidly at first, then leveled off in late March.
Which of the following is the most likely explanation for why the population of Eastern Cottontail Rabbits did not continue to increase rapidly?
A. The number of predators of Eastern Cottontail Rabbits decreased.
B. As the population of Eastern Cottontail Rabbits in Red Forest increased, food resources became scarce.
C. Increased rainfall in the spring caused fresh water supplies in Red Forest to become more plentiful.

What is a key part of Darwin's idea of natural selection

Explain what has to happen to join two monosaccharide units into a disaccharide.

Pumps move substances ____________ a concentration gradient, a process that requires energy. Channels instead provide the means to move a substance ____________ a concentration gradient. Neurons contain the following major types of channels: • Channels that are always open, allowing continuous diffusion of a specific ion from a region of ____________ concentration to a region of ____________ concentration are leak channels. • Channels that are normally closed that open in response to the binding of a ____________ are chemically gated channels. When open, they allow a specific ion to ____________ across the plasma membrane. • Channels that are normally closed, but open in response to changes in ____________ across the plasma membrane are voltage-gated channels. When open, they allow a specific ion to diffuse across the membrane.

Joe denied being the father of Lisa. Lisa's mom took Joe to court to prove he is Lisa's biological father. The way to prove this would be by _____.recombinant DNA
hybridization
DNA profiling
cloning

4. In an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based ona. inheritance of natural variations
b. inheritance of acquired characteristics
c. natural selection
d. survival of the fittest

5. Charles Darwin called the ability of an organism to survive and reproduce in its specific environment
a. diversity
b. fitness
c. adaption
d. evolution

6. Similar patterns of embryological development in different but related organisms are responsible for the formation of
a. homologous structures
b. analogous structures
c. Hox genes
d. intermediate fossil forms

7. If an allele makes up one half of the frequency of a population's allele for a given trait, its allele frequency is
a. 100 percent
b. 75 percent
c. 50 percent
d. 4 percent

8. The frequency of phenotypes for a typical polygenic trait is most often illustrated as
a. a scatter plot
b. a bell-shaped curve
c. a pie chart
d. a histogram

9. Which of the following events do biologists consider a random change?
a. directional selection
b. speciation
c. disruptive selection
d. genetic drift

10. Which of the following statements defines the members of a species?
a. They are temporarily isolated from each other
b. The are geographically isolated from each other
c. They mate and produce offspring
d. They have identical genes

Of the five characteristics of living things, which one is required for the species to survive but does not have to apply to an individual