The glands of vertebrates are derived from ________ epithelium.
A. scarified
B. endocrine
C. stratified
D. invaginated
E. keratinized
Answer: D
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When an infection occurs by the same
pathogen, the immune response is more rapid the next time around thanks to
a. effector cells. b. memory cells. c. naive T cells. d. neutrophils. e. eosinophils
Which of the following statements best describes the relationship between photosynthesis and respiration?
A) Respiration runs the biochemical pathways of photosynthesis in reverse. B) Photosynthesis stores energy in complex organic molecules; respiration releases energy from complex organic molecules C) Photosynthesis occurs only in plants; respiration occurs only in animals. D) Photosynthesis is catabolic; respiration is anabolic.
Proper sequence:
1. Homologous chromosomes are brought into perfect alignment by a protein complex forming tetrad. 2. Chromatids separate and go to opposite poles. 3. Homologous chromosomes separate and go to opposite poles. 4. Chromatids of one homologous chromosome exchange fragments with chromatids of the other chromosome. 5. Pairs of homologous chromosomes line up along the cells equatorial plate.
Which of the following is not true regarding ribosomes?
A. They contain an A site and a P site. B. They translate RNA into protein. C. They contain both RNA and protein. D. They function within the nucleus. E. They are composed of two subunits.