Which type of reproductive isolation operates to keep the mosquitofish isolated, even when fish from different ponds are reunited in the same body of water?
A) behavioral isolation
B) habitat isolation
C) temporal isolation
D) mechanical isolation
E) gametic isolation
Answer: A
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Organisms that degrade hydrocarbons in crude oil are ubiquitous in the environment and have evolved special strategies, such as surfactant production, that allow them to readily use hydrocarbons as electron donors and carbon sources
Indicate whether the statement is true or false.
The text discusses what types of morphological characteristics were used by early scientists to arrive at the phylogeny of animals. DNA sequence data have helped in the revision of phlyogenies of taxa within the larger groups
(i.e., bilaterians, sponges, cnidarians). Why are characteristics like "fate of the blastopore" or "body symmetry" relatively good at predicting larger-scale branching patterns on phylogenies? A. The development of these characteristics is controlled genetically, so similarities in DNA sequence would be expected in more closely related taxa. B. Characteristics like those described are necessary for living, so all organisms must have those traits. C. All animals are descended from a common ancestor that had the traits described above. D. The development of these characteristics is controlled genetically, so DNA sequences for important genes would be the same between closely related taxa.
Which of the following plant secondary metabolites is used as an antimalarial drug?
A. manihotoxin B. quinine C. taxol D. genistein E. morphine
What is the difference between a viral lytic cycle and a viral lysogenic cycle? What will be an ideal response?