Which one of the following is true of the sporophyte stage of a flowering plant?
A. It is haploid.
B. It is 1N.
C. It is a nonphotosynthetic stage.
D. It is the obvious stage such as an oak tree.
E. It is dependent on the gametophyte for nutrition.
D. It is the obvious stage such as an oak tree.
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Cnidarians are able to capture prey with the aid of _____, harpoon-like organelles that are often tipped with neurotoxins
A. choanocytes B. nematocysts C. mesoglea D. polyps E. none of these
In the life cycle of a flowering plant, the ___
a. sporophyte is dominant b. gametophyte is dominant c. sporophyte initially is dominant and then the gametophyte becomes dominant d. gametophyte is initially dominant and then the sporophyte becomes dominant e. gametophyte and sporophyte are codominant.
The outer ring of leaflike sepals that serves to protect the more delicate parts of a flower is referred to as the ____
a. carpel b. stamen c. corolla d. calyx e. ovule
You paid $1,000,000 to purchase a black Angus bull named Maxwell that was advertised as a "pure-breeding" black Angus cow (BB; B = black and b = brown; B is dominant to b)
You mated Maxwell with Bessie, who also was advertised as a pure-breeding black Angus cow (BB); as you expected, all of their offspring were black. Several years later, you mated a pair of these offspring several times (F1 × F1) and found that approximately 25% of the F2 progeny were brown instead of black. What were the actual genotypes of the original cross (Maxwell × Bessie)? A) BB × BB B) Bb × BB C) Bb × Bb D) BB × bb E) bb × bb