Which animal lacks a "true" coelom?
a. flatworms only
b. annelids only
c. roundworms only
d. flatworms and annelids
e. flatworms and roundworms
ANSWER: e
You might also like to view...
The first cells were ____
anaerobic a. autotrophic b. parasitic c. anaerobic d. aerobic e. necrotic
According to the Hardy-Weinberg principle, if 75% of the alleles in the gene pool are A1 and 25% are A2, what is the proportion of individuals with genotype A1A2 in this population?
A) 0.1875 B) 0.375 C) 0.0625 D) 0.5625 E) 0.025
Radiation therapy for cancer works because a cell's DNA is exposed during mitosis and is most vulnerable to damage from radiation. Because cancer cells are uncontrollably undergoing mitosis, they die when exposed to the treatment. The common side effects of radiation treatment are hair loss and vomiting. What does this imply?
A) Radiation treatment will be ineffective in treating stomach cancer. B) Radiation treatment will be most effective for the treatment of skin and stomach cancers. C) Both skin and stomach cancer will be made worse if treated with radiation. D) Both stomach and skin cells are constantly being replaced. E) Radiation therapy is an ineffective way to treat cancer.
Which of the following has eggs that do not require a moist environment to complete development?
a. Salamander b. Frog c. Toad d. Cecilia e. None of the listed responses are correct.