You add a weak acid solution to a sample of foraminifera shells, and they bubble and fizz. This tells you that the external shells of foraminiferans are composed of:
a. silica.
b. protein.
c. cellulose.
d. calcium carbonate.
e. starch.
D
You might also like to view...
If the progeny of a mating of pea plants have the following ratios 1342 smooth seed/green pod, 447 wrinkled seed/yellow pod, 429 smooth seed/ yellow pod, 1361 wrinkled seed/green pod what are the genotypes of the parents?
A. Parent 1: Homozygous for seed shape and pod colorParent 2: Heterozygous for seed shape and homozygous for pod color B. Both parents are heterozygous for seed shape and pod color C. Parent 1: Heterozygous for seed shape and pod colorParent 2: Homozygous seed shape and heterozygous for pod color D. Parent 1: Heterozygous for both seed shape and pod color Parent 2: Homozygous for both seed shape and pod color
If a mutation occurred in a human such that the pharyngeal slits never formed, what do you predict would be the consequence?
A. A cleft palate would form. B. The eustachian tubes would not form. C. The thyroid gland would not form. D. The glottis would not form. E. The opening to the voice box would not form.
Which are evolutionary modifications that improve the survival and reproductive success of an organism?
a. mutations b. adaptations c. artificial traits d. homoplastic traits e. vestigial structures
Which is incorrect about Yersinia pestis?
A. exhibit bipolar staining B. gram negative rod C. produces coagulase D. has a capsule E. produces enterotoxin