What is the dual function of the gastrovascular cavity in a flatworm?
a. circulatory and respiratory
b. respiratory and reproductive
c. digestive and respiratory
d. digestive and circulatory
Ans: d. digestive and circulatory
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Mendel crossed true-breeding plants having yellow peas with true-breeding plants having green peas. The resulting
plants all had yellow peas. An F1 cross resulted in 3/4 of the plants having yellow peas and 1/4 of the plants having green peas. What does this tell you about the alleles for color?
a. yellow is usually the dominant color, but sometimes green can be dominant b. green is the dominant color c. yellow is the dominant color d. yellow is the recessive color e. yellow and green are codominant
Which of the photographs in the above figure
represents the angiosperms? a. moss b. fern c. conifer d. monocot e. all of thes
Which of the following is a protist that causes an STD?
A. Gardnerella vaginosis B. Chlamydia trachomatis C. Candida albicans D. Neisseria gonorrhoeae E. Trichomonas vaginalis
If a sheep and goat are mated, their offspring dies as an embryo. This is an example of _______ reproductive isolation.
A. prezygotic B. allopatric C. sympatric D. postzygotic E. outgroup