Which type of animal depends on the environment for body heat?
a. endotherm
b. mesoderm
c. ectotherm
d. anterotheil
c. ectotherm
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Which of the characteristics of the malaria parasite Plasmodium listed below reflect the evolution of mechanisms to evade the immune system? Select all correct answer options
A. The fact that the malaria parasite is a eukaryote. B. The fact that infected cells remain in the blood vessels and out of the spleen because the malaria parasite expresses a sticky protein in its plasma membrane. C. The fact that the malaria parasite has a nucleus and membrane-bound organelles. D. The fact that the malaria parasite produces proteins. E. The fact that the malaria parasite shows antigenic variation in its cell surface proteins.
Nervous tissue is composed of neurons and ____________________, which support and nourish neurons. Fill in the blank(s) with the appropriate word(s)
The formation of citric acid from oxaloacetic acid and an acetyl group begins
A. the electron transport system. B. fermentation. C. glycolysis. D. oxidative phosphorylation. E. the Krebs cycle.
Deletion of one of the two trp codons in the leader sequence of the TRP operon (att-) result
a. the operon never being transcribed b. in little or no phenotype in the presence of high TRP in the cell. c. in the operon not being able decrease production of TRP when TRP is high in the cell. d. an increase in the production of TRP regardless of the levels of TRP in the cell