What are the "seed leaves" that grow from bulges on the embryo called?
A. Ovules
B. Embryo sacs
C. Radicles
D. Cotyledons
E. Petioles
Answer: D
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Isotopes are different forms of the same element that
A. differ in their number of neutrons. B. have the same numbers of protons. C. are often used in medicine to track biological processes. D. can be found in nature. E. All the choices are correct.
Why are red algae found in deeper oceanic waters?
A. They possess pigments that allow them to utilize red light. B. They are able to utilize the more saline deep water. C. Red algae prefer the warmer deep water. D. They possess pigments that allow them utilize blue-green-light. E. Fewer algae predators are found in deeper water.
A mechanism of gene regulation that controls the amount of mRNA available for translation is called ____________________
Fill in the blank(s) with correct word
Which of the following statements is incorrect about the MMR vaccine?
A. It is given in early childhood. B. It protects against three different viral diseases. C. It contains toxoids. D. It contains attenuated viruses.