Which of the following actions occurs in many plants when CO2 concentrations are high?
A. Guard cells lose turgor, and the stomata close.
B. Water evaporates at a higher rate than usual.
C. CAM photosynthesis fixes CO2 at night.
D. Oxygen is used by plants for photosynthesis.
E. Calcium ions are transported faster through the phloem.
A. Guard cells lose turgor, and the stomata close.
When carbon dioxide levels are high the stomata can close because the Calvin Cycle has the material needed to produce sugar. It is only when the cells are deficient in carbon dioxide that the stomata need to open.
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Which term refers to an individual with identical alleles of a particular gene?
a. Genotype b. Heterozygous c. Homozygous d. Gene e. Phenotype
What are the numbered structures shown in this diagram?
a. glycocalyx
b. phospholipids
c. integrins
d. cholesterol
Only one parent is needed for
A. sexual reproduction. B. identical twins. C. intraspecific hybrids. D. asexual reproduction.
I give you a coin, and you flip it 100 times. Let X = the number of heads observed in those 100 flips. You build the following line of reasoning:Steps1. You assume each flip is an independent, random outcome.2. You assume the coin is fair.3. Using your statistics book, you conclude that X is distributed binomial with mean 50 and variance 25.4. Based on this distribution, you conclude that you would observe X < 41 or X > 59 approximately 5% of the time.5. You observe X = 37 and conclude that the probability that X < 41 or X > 59 is not 5%.6. Because the probability that X < 41 or X > 59 is not 5%, you conclude the coin is not fair.Which of these steps is part of deductive reasoning?
A. Steps 1, 2, 3, 4, and 6 only B. All 6 steps C. Steps 3, 4, and 5 only D. Steps 4 and 6 only