Fungal spores
A. cannot be seen in a light microscope.
B. are produced by molds but not by yeasts.
C. are only asexually produced.
D. are only produced under harmful environmental conditions.
E. are used to identify fungi.
Answer: E
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Which of the following statements accurately describes the role of insects in early angiosperm evolution?
A. Insect pollination may have allowed early angiosperms to thrive in the understory habitats of tropical rain forests. B. Insect pollination may have allowed early angiosperms to thrive in the canopy of tropical rain forests. C. Mammal pollination may have contributed to early angiosperm success. D. Very few living members of the earliest angiosperm lineages produce flowers that are visited by insects. E. Insects did not play a significant role in early angiosperm evolution.
The simple plant tissues are __________, __________, and __________. Fill in the blank(s) with the appropriate word(s)
Which of the following represents a blind study?
A) The test group knows whether they are receiving a placebo or the actual treatment, and so do the researchers. B) The test group does not know whether they are receiving a placebo or the actual treatment, but the researchers do. C) The test group knows whether they are receiving a placebo or the actual treatment, but the researchers do not know until all the data are collected. D) Neither the test group nor the researchers know whether the test group is receiving a placebo or the actual treatment until all the data are collected.
The incidence of Tay-Sachs disease has been reduced by 75% since the introduction of genetic screening in 1969. Which of the following is NOT an important component of this reduction in incidence of Tay- Sachs disease?
a. genetic counseling b. the fact that Tay-Sachs is caused by a dominant allele c. testing of embryos after fertilization d. birth control e. All of the above are important components of the reduction in incidence of Tay-Sachs disease.