Which group of plants common during the Triassic period had seeds lacking a protective outer coat?

Use the following terms in the same sentence:gene and allele

Which gland is responsible for the "fight or flight" response? a. pituitary b. adrenal medulla c. adrenal cortex d. thyroid e. testes

Feather color in budgies is determined by two different genes Y and B. YYBB, YyBB, or YYBb is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white. Two blue budgies were crossed.

Lily plants have 24 chromosomes. if a lily leaf cell undergoes mitosis, how many chromosomes will each daughter (new) cell have?

3. Mammals and birds are able to maintain relatively constant body temperatures. In cold weather, their internal temperatures could be many degrees warmer than the air temperature around them.

Why sugar dissolves easily in water but sand do not?

Independent variable (What is the variable that you deliberately change?)

Question from Campbell Biology Chapter 23: 48) If global warming permits mosquitoes to live at higher altitudes than they currently do, then in which direction should the entire plot in the correct distribution below be shifted?

What do humans and amoebas have in common

Major consequence of ozone depletion is that a. solar energy will become ineffective. b. more harmful uv rays will reach the earth's surface. c. acid rain will increase. d. certain parts of the earth will become over-vegetated.