A plant will begin flowering in response to changes in length of daylight, temperature, and light quality. This is an example of which unifying principle of life?
A. Plants conduct photosynthesis.
B. Living organisms maintain homeostasis.
C. Living organisms interact with their environment.
D. Living organisms grow and develop.
E. Populations of organisms evolve from one generation to the next.
C. Living organisms interact with their environment.
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Which of the following vertebrates relies on a positive pressure filling mechanism to move air into their lungs?
A. human B. eagle C. bullfrog D. crocodile E. mouse
Which of the following statements about homeotic genes is true? a. All homeotic genes encode enzymes for metabolic pathways that produce pigments affecting eye and body color
b. All homeotic genes encode transcription factors with a homeodomain that can bind to a promoter. c. Homeotic genes encode enzymes that allow Drosophila to break down and digest fructose. d. Homeotic genes are believed to have evolved recently as they are not interchangeable between most species.
Which best describes photo-oxidative damage?
a. low energy environments associated with pigment molecules and excited electrons b. high energy environments associated with pigment molecules and excited electrons c. high energy environments associated with pigment molecules and non-excited electrons
What role do plasmodesmata play in plant cells?
-They prevent the plant cell from losing water in desert conditions. -They allow the plant cell to withstand extreme temperatures. -They serve as sites of protein production in the cell. -They serve as communication portals between neighboring plant cells, allowing the passage of substances between the two cells.