The organelle that "packages" and "ships" proteins for transport within and out of the cell is the
a. ribosome.
b. lysosome.
c. nucleolus.
d. Golgi body.
e. peroxisome.
D
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At steady state equilibrium, microtubules in a test tube have a________ and_______ end
Fill in the blank(s) with the appropriate word(s).
If a gene were transferred naturally by a bacterium from a plant genome to an insect genome, it would
be an example of: a. transgender activity. b. genome shuffling. c. horizontal gene transfer. d. genome switching. e. restriction.
Dosage compensation in mammals typically involves the random inactivation of one of the two X chromosomes relatively early in development. Such X chromosome inactivation often leads to phenotypic mosaicism. Assume that black fur in cats is due to the
X-linked recessive gene b, whereas its dominant allele B produces yellow fur. A Bb heterozygote is a mosaic called "tortoise shell" or "calico." A mating between a black male and a calico female occurred. Give the phenotypes of the offspring. A) all black regardless of sex B) calico females, black females, yellow makes, and black males C) calico females and yellow males D) all calico regardless of sex E) calico females, yellow females, black males, and yellow males
If one wanted to find the largest number of endemic species, one should visit which of the following geological features
A) an isolated ocean island in the tropics B) an extensive mountain range C) a midcontinental grassland with extreme climatic conditions D) a shallow estuary on a warm-water coast