 |
1 | |
The hormone responsible for phototropic responses in the growing tips of plants is |
| | A) | auxin. |
| | B) | cytokinin. |
| | C) | gibberellin. |
| | D) | ethylene. |
|
|
2 | |
Tomatoes can be artificially ripened through the use of |
| | A) | auxin. |
| | B) | cytokinins. |
| | C) | gibberellins. |
| | D) | ethylene. |
|
|
3 | |
Which of the following is (are) not associated with germination? |
| | A) | increase in water content |
| | B) | resumption of metabolism |
| | C) | intake of oxygen |
| | D) | intake of carbon dioxide |
|
|
4 | |
What is the name of the sticky top part of the carpel (female reproductive structure)? |
| | A) | stigma |
| | B) | anther |
| | C) | style |
| | D) | filament |
|
|
5 | |
All of the stamens of an angiosperm flower together are called the |
| | A) | calyx. |
| | B) | corolla. |
| | C) | androecium. |
| | D) | gynoecium. |
|
|
6 | |
The liquid produced in the flower of a plant which is rich in sugar, amino acids, and other substances and which is the reward sought by animals during pollination is |
| | A) | ethylene. |
| | B) | nectar. |
| | C) | auxin. |
| | D) | honey. |
|
|
7 | |
From what flower part does the fruit of a plant typically develop? |
| | A) | ovary |
| | B) | ovule |
| | C) | calyx |
| | D) | corolla |
|
|
8 | |
What plant hormone, in combination with auxin, stimulates cell division in plants and determines the course of differentiation? |
| | A) | abscisic acid |
| | B) | gibberellin |
| | C) | cytokinin |
| | D) | ethylene |
|
|
9 | |
In photoperiodism, most spring flowers are examples of |
| | A) | short-day plants. |
| | B) | long-day plants. |
| | C) | day-positive plants. |
| | D) | day-neutral plants. |
|
|
10 | |
The growth response of a plant to an externam stimulus is called |
| | A) | dormancy. |
| | B) | photoperiodism. |
| | C) | tropism. |
| | D) | adhesion. |
|
|
11 | |
"Agent Orange" is dangerous to humans because it is an endocrine encrypter. |
| | A) | true |
| | B) | false |
|
|
12 | |
The response of a plant to touch is called thigmotropism. |
| | A) | true |
| | B) | false |
|
|
13 | |
In the angiosperm flower, the male gametophytes, or microgametophytes, are pollen grains. |
| | A) | true |
| | B) | false |
|
|
14 | |
All of the sepals of a flower together are called the corrolla. |
| | A) | true |
| | B) | false |
|
|
15 | |
The process by which pollen is transferred from an anther to a stigma is called pollination. |
| | A) | true |
| | B) | false |
|
|
16 | |
In angiosperm reproduction, only a single sperm is involved in the fertilization process. |
| | A) | true |
| | B) | false |
|
|
17 | |
In many plants, embryo development is arrested soon after germination. |
| | A) | true |
| | B) | false |
|
|
18 | |
Auxin is produced primarily in the apical meristerms of plants. |
| | A) | true |
| | B) | false |
|
|
19 | |
2, 4-D is a synthetic auxin used as a weed killer for lawns, since it only affects broad-leaved plants. |
| | A) | true |
| | B) | false |
|
|
20 | |
Gibberellins induce the formation of winter buds—dormant buds that remain through the winter-by suppressing growth. |
| | A) | true |
| | B) | false |
|