A fluid-filled body cavity that forms completely within the mesoderm of animals is a
A. protostome.
B. blastula.
C. deuterostome.
D. gastrula.
E. coelom.
E. coelom.
You might also like to view...
________ membranes allow some molecules to pass but not others.
A. Selectively permeable B. Inverted monolayer C. Impermeable D. Permeable
Why are many human recessive disease alleles maintained in populations despite continuing selection against them?
A) Heterozygotes have a higher fitness than either homozygote. B) Mutations convert recessive alleles to dominant alleles. C) Even when the allele frequency is low, many gametes contain the recessive allele. D) Allele frequency remains constant from generation to generation.
What is energy?
A) the capacity to cause movement B) the capacity to cause change C) a measure of calories D) a measure of disorder
Which of the following methods would be most appropriate for gathering data to plot a bacterial growth curve throughout the four phases?
a. plate count b. indirect estimate based on turbidity c. electronic cell counter d. Any of these methods will provide reliable data for plotting a growth curve. e. direct microscopic count