Female salmon build nests in gravel river bottoms to lay eggs, which are then fertilized by male salmon that approach and deposit their sperm over the eggs. This is an example of
A) copulation.
B) internal fertilization.
C) parthenogenesis.
D) spawning.
E) hermaphrodism.
D
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What do you know about enzymes activated by inositol triphosphate? What other information is related to the question?
What will be an ideal response?
Some restriction endonucleases cut the DNA in such a way that short, single stranded regions are
created. We call these regions
a. hydrogen-bonding ends b. sticky ends c. tacky ends d. blunt ends e. jagged ends
Which factor is contributing to the worldwide decline in amphibians?
A. toxic chemical pollutants B. habitat deterioration C. fatal infections D. introduction of exotic species E. All of these are contributing factors.
Scorpions have a prosoma, pedipalps that are modified into claws, and chelicerae. Which taxonomic group are they a member of?
A. Hexapoda B. Crustacea C. Chelicerata D. Myriapoda