Which of the following develop into seeds?
a. embryo sacs
b. ovaries
c. carpels
d. ovules
e. megaspores
Answer: d
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Most animal hormones _____
A) are produced by endocrine glands B) are lipid-soluble molecules C) are carried to target cells in the blood or hemolymph D) are protein molecules E) elicit the same biological response from all of their target cells
Which of the following is directly involved in removing Spo11 that is covalently bound to the 5'-ending strand during meiosis?
A. RPA B. ExoI C. Rad50 D. Sgs1 E. Dmc1
Why do some seeds have to pass through an animal’s digestive tract in order to germinate?
a. The animal digests the seed coat. b. There is a lack of oxygen. c. There is a lack of sunlight. d. The temperature is appropriate.
Because an individual with an XX genotype is a female, is an individual with an XO (no second sex chromosome) a male?
a. No, because the X always overrides the Y and makes that embryo female. b. No, because the Y chromosome contains the gene that makes an embryo male. c. Yes, because if there is only one X, the embryo cannot become female. d. Yes, because all embryos start off as males.