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Chose a b c or d

21. Pollen grains are produced by
a.male reproductive structures.
b. flowers.
c. female reproductive structures. d. ovules.

22. Which of the following is the only tissue that produces new plant cells?
a. phloem
b. ground tissue
c. xylem
d. meristematic tissue

23.A period of dormancy can allow seeds to germinate
a. under poor conditions.
b. without water.
c. under ideal conditions.
d. in extreme
temperatures.

24.What might a thin tree ring indicate?
a. decreased production of phloem
b. xylem production in winter
c. a year of drought
d. increased production of xylem

25. Cytokinins differ from auxins in that cytokinins
a. cause seeds to remain dormant.
b. inhibit lateral bud growth.
c. cause leaves to fall.
d. inhibit elongation of cells

26. Minerals from the soil move into roots by
a. transpiration.
b. root pressure.
c. active transport.
d. diffusion.

27. The first plants evolved from
a. mosses.
b. photosynthetic prokaryotes.
c. a protist that lived on land
. d. an organism
similar to multicellular green algae.

28. In angiosperms, reproduction takes place in
a. flowers.
b. cones.
c. leaves.
d. pollen.

29. A plant is a(an)
a. multicellular prokaryote
. b. unicellular prokaryote.
c. unicellular eukaryote.
d. multicellular eukaryote.

31.
The tough outer layer of a seed is called the
a. nut.
b. seed coat.
c. fruit. d. embryo wall.

32. Plants can respond to changing environmental conditions by the use of which chemicals?
a. hormones
b. enzymes
c. pigments d. sugars

33. A seed that is dispersed to an area far away from the parent plant might face less
a. germination.
b. alternation.
c. pollination.
d. competition.

34. Hormones that stimulate cell elongation and are produced in the rapidly growing region near
of the plant's root or stem are called
a. cytokinins.
b. ethylenes.
c. auxins.
d. gibberellins.

35.Which of the following is NOT a characteristic of all plants?
a. produce seeds
b. are eukaryotic
c. have cell walls
d. are multicellular

36. Seeds dispersed by animals typically are contained in
a. thin coatings that are easily digested.
b. fleshy, nutritious fruits.
c. lightweight structure
d. unripened ovaries

User Que
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1 Answer

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Answer:

1. B, Angiosperm pollen is produced in the anther

2. A, Vascular cambium produces secondary xylem (toward the center of the stem or root) and phloem (toward the outside of the stem or root), adding growth to the diameter of the plant. This process produces wood, and builds the sturdy trunks of trees.

3. A, A meristem is a region of undifferentiated cells from which new cells arise through cellular division.

4. D, Propagation is the breeding or making of offspring in plants or animals. Vegetative propagation can be described as the process of making new plants from a part (stems, leaves, or other structure) of the parent plant.

5. A, Auxins are primarily produced in areas that are experiencing rapid growth such as shoot tissue, young leaves and developing seeds.

6. D, The mechanism in which seeds are prevented from germination during a particular condition is called seed dormancy. In this stage, the seeds are entering a state where it is alive but there is an absence of growth and development.

7. C, Monocots have usually collateral vascular bundles, a type that is also called closed.

8. C, In the typical flowering plant, or angiosperm, seeds are formed from bodies called ovules contained in the ovary, or basal part of the female plant structure, the pistil.

9. A, Primary growth occurs at the apical meristem (a meristem located at the tip of a stem). A meristem is a region of undifferentiated cells from which new cells arise through cellular division. Secondary growth is an increase in thickness or girth of the plant body due to activity of lateral meristems.

10. C, The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.

these answers are for another post i saw of yours, copy and paste to save it just in case this gets deleted

User Shams Nahid
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