Describe 3 adaptations of benthic fishes for living on the continental shelf
What will be an ideal response?
Fishes that live on or near the bottom (demersal) have a number of useful adaptations for this environment. They are usually flat (flatfishes, rays, and skates); they have jaws that are adapted for feeding on benthic shelled invertebrates; they have specialized sense organs; some employ specialized feeding structures such as lures; and some have a camouflaged dorsal surface.
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For a healthy woman under age 30 with regular menstrual periods and having sex regularly but not using birth control, pregnancy typically occurs
A) in two weeks. B) in one month. C) in three or four months. D) in about one year.
Which of the following is a fungus?
A. Truffles B. Mushrooms C. Yeast used to make bread D. All of the above are types of fungi
A technique used to identify species by matching up sequence differences in a standard region of the genome is called
a. mutation counting. b. genome sequencing. c. DNA barcoding. d. nucleotide matching. e. PCR
Barbara McClintock discovered mobile elements in corn by analyzing the genetic behavior of two elements, Ds and Ac. The interplay between these two elements has become one of the most interesting stories of discovery in the field of genetics. How do Ds
and Ac interact? A) Ds causes a deletion next to the insertion site of Ac. B) Ac causes a deletion next to the insertion site of Ds. C) While Ds moves only if Ac is present in the genome, Ac is capable of autonomous movement. D) Both elements can move only within chromosome 9. E) The movement of Ac is dependent on two forms of Ds.