In Your Backyard You Overturn a Large Rock

question 59

Multiple Choice

In your backyard you overturn a large rock. In the damp soil underneath the rock, you see various insects scurrying for cover: one black spider, five black ants, two brown beetles, and three gray pillbugs. In this community of organisms, species richness is represented by

• A) the ants, since there are more of them than any other organism.
• B) eleven total organisms.
• C) four different species of organisms.
• D) the ants and the spider equally, since they have the greatest number of organisms of the same color.

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Definitions:

Progesterone

A steroid hormone released by the corpus luteum that stimulates the uterus to prepare for pregnancy.

Estrogen

A group of steroid hormones that promote the development and maintenance of female characteristics of the body.

Feedback Loops

Mechanisms that use the outcomes of processes to regulate and control the processes themselves, often maintaining stability in systems.

Female Hormones

Chemical substances, such as estrogen and progesterone, produced mainly by the ovaries that regulate female reproductive functions and secondary sex characteristics.