biology questions???

Question

1. during fertilization in flowering plants, one sperm fuses with an egg to form an embryo, and another fuses with two nuclei to form nutritive tissue. this event is called
a. self-pollination
b. adaptation
c. maximization
d. double fertilization

2. unlike mosses, ferns possess
a. spore capsules
b. archegonia
c. antheridia
d. vascular tissue

3. which of the following hormones normally exists in a gaseous state?
a. auxin
b. cytokinin
c. ethylene
d. gibberellin

4. the root cap
a. protects the groing root top
b. stores food in the form of starch
c. absorbs water
d. contains meristematic tissue

5. potatoes are actually
a. roots
b. tubers
c. flowers
d. leaves

6. the seed coat
a. provides the seed with nourishment
b. aids in the dispersal of seeds
c. protects the seed from drying out
d. causes the seed to reproduce

7. the diploid form in a plants life cycle is called the
a. sporophyte
b. gametophyte
c. parental generation
d. alternate generation

10 points to ecolink if they answer all those questions right! thanks :)

Answer 1

1 D Double fertilization because two sperm nuclei are doing the fertilizing.

2. D Ferns are vascular plants and mosses are nonvascular. They still do the alternation of generations thing.

3. C Ethylene is a gas.

4. A The root cap protects the growing root TIP.

5. B Potatoes are actually tubers which are specialized underground stems for food storage.

6. C Protects the seed from drying out (and also serves to protect the embryo from physical damage)

7. A The diploid generation has to be the sporophyte. Just think of how the sporophyte was made. An egg and a sperm had to join together in the gametophyte to make the sporophyte. That means there was a set of chromosomes from the egg and a set of chromosomes from the sperm = 2 sets of chromosomes = diploid.

Note: Plenty of people on Yahoo answers know exactly what they are talking about. I am always impressed with the quality of the answers.