Amphibians evolved directly from which ancestral organisms?
a. fishes
b. reptiles
c. small mammals
d. soft-bodied animals
e. marine invertebrates
a
You might also like to view...
The main goal of sustainable development is to _____
A) involve more countries in conservation efforts B) use only natural resources in the construction of new buildings C) use natural resources such that they do not decline over time D) reevaluating and re-implementing management plans over time
Macrophages (antigen-presenting cells) will interact with _____ cells which then continue the immune response.
A. cytotoxic T cells B. helper T cells C. B cells D. natural killer cells
Linked genes are usually ________
A) found on the X chromosome B) found on the Y chromosome C) codominant D) located close together on a chromosome
Which of these associations is incorrect?
Select one: a. epidermal cell--protection b. stomata--gas exchange c. sclerenchyma cells--cell division d. sieve-tube members--sugar transport e. xylem cells--water transport