Which substance do we consider to be the elementary unit of life?

A. DNA

B. protein

C. red blood cells

D. white blood cells

E. chromosomes

4. Based on the data you found, about how many of the 100 aliens would become thin if the temperature were 35 C

Brown hair and brown eyes are dominant traits in humans. If both parents have brown hair and brown eyes, how is it possible that their children can have blond hair and blue eyes? A. Both parents are homozygous for brown eyes; B.

In which major ocean zone are plants and animals exposed to air for part of the day a. intertidal zone b. neritic zone c. oceanic zone d. benthic zone

Which of the following is correctly matched? a) zona fasciculata mineralocorticoids b) zona reticularis gonadocorticoids c) zona glomerulosa epinephrine and norepinephrine d) adrenal medulla glucocorticoids

Plants gather the suns energy with light-absorbing molecules called?

Which of the following is needed for natural selection to occur? Select one: a. variation in characteristics b. differences in fitness c. heritability of characteristics d. all of the above

When the sun's disk is covered in an eclipse the corona is still visible?

When you flip a coin, what is the probability that it will come up heads? A. 1 B. 1/4 C. 1/2 D. 1/8

When you are eating a celery stick, you are eating the tissue of a plant.

Which phase of mitotic division is the highlighted cell undergoing