All of the following statements about exoskeletons are correct EXCEPT
A. exoskeletons are made of chitin.
B. muscles are attached to the exoskeleton.
C. exoskeletons do not limit growth because they can stretch.
D. exoskeletons are shed by many arthropods in a process called molting.
E. chitin is a polysaccharide.
C. exoskeletons do not limit growth because they can stretch.
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Imagine that you have been assign the task of describing a new mammalian species. You note that this species has mutated so RBCs no longer go through final stage of maturation. Predict how this might affect the species.
A. Red blood cells could replicate outside of bone marrow since they retain their nuclei. B. Red blood cells could improve their oxygen-carrying function. C. Red blood cells would be better able to fight infection in the body. D. Red blood cells could act as stem cells.
What gives red muscle fibers their characteristic color?
a. free oxygen b. carbon dioxide c. lactate d. pyruvate e. myoglobin
Which statement describes ovaries and egg cells?
A. A woman with only one ovary cannot conceive. B. The ovaries produce eggs and manufacture sex hormones. C. The ovaries are connected directly to the fallopian tubes. D. The eggs cannot be fertilized outside the fallopian tubes.
According to the life table, the average age of maturity for this population is
A) age 0. B) age 1. C) age 3. D) age 4. E) ages 3-5