What is the period of rapid cell division in which the embryo does not increase in overall size?
A. syngamy
B. cleavage
C. neurulation
D. meiosis
E. crest formation
B. cleavage
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Members of the ____ Ecdysozoan phylum, commonly called roundworms, are so plentiful in soil and other places that
they may be the most abundant animals on Earth.,
a. Arthropoda b. Onychophora c. Nemertea d. Annelida e. Nematoda
A person with type A positive blood has which cell markers?
a. A only b. Rh only c. A, B and Rh d. A and Rh e. O and Rh
Which one of the following is TRUE regarding fossils?
A) Fossils are more likely discovered under the sea than on land. B) Even though fossils from more than 200,000 different species have been found, the fossil record remains incomplete. C) Because organisms are primarily composed of soft tissue, it is more likely that soft tissue is fossilized than hard tissue. D) Once fossilization is complete, no further degradation of the fossil can occur. E) Because fossils are so old, it is not possible to determine their age.
The type of muscle tissue that can be under our conscious control is:
A) smooth and cardiac. B) skeletal and smooth. C) skeletal. D) smooth. E) cardiac.