The common infection known as "pink eye" is an infection of the
A) sclera. B) cornea. C) iris. D) conjunctiva. E) retina.
Answer: D
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A ______________ group does not contain the most recent common ancestor.
Fill in the blank(s) with the appropriate word(s).
A condition in which the placenta forms in the lower half of the uterus and covers the cervix, which may result in premature birth or maternal hemorrhage, is called ________
A) cesarean section B) neural tube C) colostrum D) placenta previa
Which of these events occurred during the Paleozoic?
a. origin of Earth b. colonization of land by plants c. origin of eukaryotes d. origin of multicellularity e. first humans
Which of the following statements is true regarding the pollen of gymnosperms and angiosperms? Select all correct choices
A. Pollen grains from both of these plants consist of four cells. B. A single angiosperm produces more pollen than a single gymnosperm. C. Pollen from both types of plant form pollen tubes that factor in fertilization. D. Pollen from both types of plants contain (or will form) haploid (1n) male gametes.