Adult members of this lineage of Cnidarians are predominately medusae. They are the true jellyfishes,
and are not active swimmers.
a. Hydrozoa
b. Scyphozoa
c. Trematoda
d. Cubozoa
e. Anthozoa
B
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Insect malpighian tubules form pre-urine, which is further processed by which of the following anatomical structures?
A) hindgut B) hemolymph C) rectal gland D) spiracles
Which statement BEST describes the habitats of the fungi?
A) Most fungi are aquatic, microscopic, and primarily freshwater. B) Most fungi are aquatic and primarily marine. C) Most fungi are terrestrial, microscopic, and inhabit soil or dead plant matter. D) Most fungi are terrestrial and macroscopic.
How are the zygote and the dikaryotic stages of a fungal life cycle related?
A. The dikaryotic stage gives rise to the zygote through karyogamy. B. The dikaryotic stage and zygote stage are both diploid. C. The zygote stage gives rise to the dikaryotic stage through plasmogamy. D. The dikaryotic stage and zygote stage occur only in asexual life cycles. E. The zygote stage gives rise to the dikaryotic stage through meiosis.
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.