Which characteristic distinguishes eukaryotes from other organisms?
a) the ability to conduct photosynthesis
b) cells with nuclei encased within membranes
c) the presence of nucleic acids
d) tissues organized into organs
Ans: b) cells with nuclei encased within membranes
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The process of ________ is described as semiconservative.
A. translation B. transcription C. mismatch repair D. transformation E. DNA replication
Which of the following is not true of the Chloroplastida (green algae)?
A. Their cell walls contain chitin. B. They are found in fresh and salt water. C. They store carbohydrates as starch. D. They have chlorophylls a and b.
Place the events of parturition in the correct order.
(1) Stretch-sensitive neurons send signals to the hypothalamus. (2) Oxytocin receptors increase in the uterus. (3) Prostaglandin levels increase. (4) Estradiol levels increase. (5) Oxytocin levels increase. (6) Uterine muscles start to contract. A. 1,2,4,5,3,6 B. 4,2,1,5,6,3 C. 5,2,4,1,3,6 D. 1,6,4,2,5,3 E. 4,3,1,2,5,6
Cyanobacterial photosynthesis is similar to plant photosynthesis in the ____
a. type of chlorophyll used b. splitting of water c. production of oxygen d. type of chlorophyll used and splitting of water e. type of chlorophyll used, splitting of water, and in the production of oxygen