According to the fossil record, which of the following were the first vertebrates to appear on land?

A. reptiles
B. mammals
C. fish
D. birds
E. amphibians


E. amphibians

Biology & Microbiology

You might also like to view...

The most common agent(s) causing subacute bacterial endocarditis is/are

A. Streptococcus pyogenes. B. Pseudomonas aeruginosa. C. normal skin or mouth microbiota. D. Escherichia coli.

Biology & Microbiology

Which of the following structures help the egg reach the fallopian tubes during ovulation?

a. Corpus luteum b. Fimbrae c. Endometrium d. Oviducts

Biology & Microbiology

Rickets is caused by

a. overexposure to UV radiation. b. an excess of calcitonin. c. inadequate amounts of vitamin D. d. an excess of ascorbic acid. e. a fetal deficiency of thyroid hormone.

Biology & Microbiology

Which of the following bacterial genera is useful for sewage treatment?

A) Burkholderia B) Thiobacillus C) Neisseria D) Zoogloea E) Nitrosomonas

Biology & Microbiology