A particular shark is dark on its dorsal side while much lighter on its ventral side. What camouflage is it exhibiting?
a. Countershading
b. Optical illusion
c. Transparency
d. Cryptic
a
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In seedcracker finches from Cameroon, small- and large-billed birds specialize in cracking soft and hard seeds, respectively. If long-term climatic change resulted in all seeds becoming hard, what type of selection would then operate on the finch
population? A) disruptive selection B) directional selection C) stabilizing selection D) No selection would operate because the population is in Hardy-Weinberg equilibrium.
Answer the following statements true (T) or false (F)
1. Slime molds possess characteristics of both fungi and protozoa. 2. Protozoa in the category known as Mastigophora move by means of cilia. 3. A dimorphic fungus would exist as a mold inside the human body. 4. The organism that causes a “red tide” is an alga. 5. Volvox is a multicellular alga.
To avoid the introduction of introns into the vector, a __________ copy of mature mRNA is made,
using the enzyme __________. a. sDNA; RNA polymerase b. cDNA; DNA ligase c. cDNA; reverse transcriptase d. sDNA; reverse transcriptase e. cDNA; DNA polymerase
A ________ is a sperm-killing chemical that is more effective as a contraceptive when used in combination with a condom or diaphragm
Fill in the blank(s) with correct word