In animals, a sphere of embryonic cells surrounding a fluid-filled cavity is called a
A. coelom.
B. blastula.
C. gastrula.
D. hydrostatic skeleton.
E. gastrovascular cavity
B. blastula.
You might also like to view...
If the complete genetic information of a person
is isolated from some of her cells, cut with restriction enzymes, inserted into a cloning vector, and introduced within bacteria for cloning purposes, what would the set of clones be called containing all the genes of that person?
a. a genetic library b. a genomic library c. a gene library d. a DNA library e. a nucleotide library
Body cells of human females contain
a. one X chromosome and one Y chromosome. b. two X chromosomes. c. two Y chromosomes. d. two O chromosomes. e. chromosomes X, Y, and O.
The integumentary system
a. covers and protects the body. b. connects muscles to skin. c. suspends organs in the abdominal cavity. d. contains endocrine glands. e. regulates muscle control
All of the following are correct about the indirect ELISA, except
A) It is the common screening test for antibodies to Hepatitis A. B) It is the common screening test for antibodies to Helicobacter. C) It can detect antibodies in a serum sample. D) A known antigen is adsorbed to the surface of a well. E) Color development indicates that antibody was not present in the patient's serum.