A species is composed of
a. related organisms.
b. a group of reproductive females.
c. populations that have the potential to interbreed and produce fertile offspring.
d. organisms located in the same habitat.
e. all males and females in the same geographical range with the same ecological requirements.
c
You might also like to view...
Some people are unable to properly metabolize the drug Purinethol, which is given to patients with acute
lymphoblastic leukemia; therefore, such patients must be first tested for the associated genetic variant to determine proper dosage of the drug. This scenario best illustrates the use of _____. a. pharmacogenomics b. map-based sequencing c. positional cloning d. annotation of DNA sequences e. comparative genomics
Which of the following observations provides the strongest evidence against root pressure being the principal mechanism of water transport in the xylem?
A) Not all soils have high concentrations of ions. B) Root pressure requires movement of water into the xylem from surrounding cells in the roots. C) Over long distances, the force of root pressure is not enough to overcome the force of gravity. D) There is no water potential gradient between roots and shoots.
Type S Streptococcus pneumoniae bacterium is lethal and will kill its host. If heat inactivated the S strain dies and becomes nonlethal. Type R Streptococcus pneumoniae is a nonvirulent strain of bacteria. What would occur if one were to inject both the R strain and heat-killed S strains into a host organism such as the mouse?
A. The R strain would be transformed into the virulent S strain and kill the host. B. The R strain would be transformed into the virulent S strain and not affect the host. C. The S strain would be transformed into the nonvirulent R strain and kill the host. D. The S strain would be transformed into the nonvirulent R strain and not affect the host. E. Neither the S nor the R strain would change.
Regulatory elements:
a. are always found close to a gene. b. control the rate of mRNA production. c. are only found in animals. d. can be found using a Punnett square. e. have no effect on the phenotype.