The light-independent reactions of photosynthesis are those that
A. convert CO2 into reduced molecules (sugars).
B. convert chlorophylls into light energy.
C. convert glucose into energy.
D. occur only at night.
E. convert water into hydrogen and oxygen.
Answer: A
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In humans, nitric oxide is an important gaseous neurotransmitter. Nitric oxide is synthesized by three isoforms of nitric oxide synthase (NOS). What would be a likely effect if a male were missing the gene that codes for one of the NOS isoforms?
A. He would be unable to produce all the liquid components of semen. B. He would have a low sperm count due to decreased spermatogenesis. C. He would have high levels of mutation within his mature sperm. D. He would have difficulty getting and/or sustaining an erection.
What is the main purpose of flowers?
A. To attract attention in the landscape B. To attract pollinators C. To attract predators D. To be pleasing to the human eye
All of the following events occur during prometaphase EXCEPT:a
the nuclear envelope breaks down. b. the nucleoli disappear. c. the mitotic spindle is completely assembled. d. the spindle fibers "capture" chromosomes. e. the duplicated chromosomes become visible with the light microscope
Patients with damage to lower motor neurons located in the spinal cord (i.e. spinal cord injury) would not present with which of the following?
a. Muscle weakness b. Decreased muscle tone c. Hyperactive reflexes d. Diminished, or absent reflexes