Which statements describe dichotomous keys? Check all that apply.

A dichotomous key uses characteristics to separate organisms from one another.
A dichotomous key uses characteristics to separate organisms into two groups.
Dichotomous keys use questions or statements to identify organisms.
Dichotomous keys may be created with yes–no questions.
Dichotomous keys may have three or more answers for each question or statement.

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

Contrast how pollination is different among gymnosperms and angiosperms.

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone