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Ch. 28 - Green Algae and Land Plants
All textbooksFreeman 8th EditionCh. 28 - Green Algae and Land PlantsProblem 3
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Chapter 27, Problem 3

What is a pollen grain?


a. sperm-producing gametophyte

b. egg-producing gametophyte

c. sperm-producing sporophyte

d. sperm

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Hey everyone, let's solve this question together. A micro spore containing male Jamie to fight within the spore wall is referred to as what. So because we're talking about micro spores which contain the male gamete. A fight. We can go ahead and eliminate answer choice is A. And B. Because as you can recall from previous videos, these are both part of the female to fight found in the mega spore. So those two can be eliminated. And now we have answer choice C. And answer choice D. So let's take a look at answer choice D. First because you might feel inclined to pick it because it says micros brandy. Um And we're talking about the micro spore. However that one is also wrong because we're talking about what's within the spore wall and within the spore wall is the pollen tube and the sperm nucleus which is also called the pollen grain answer choice C. The correct answer. Hope you found this video to be helpful. Thank you and goodbye.
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Textbook Question

What important role does lignin play in vascular plants? a. It is the major component of the cuticle, which prevents plants from drying out. b. It forms the outer layer of pollen grains. c. It forms the tough, rigid cell walls of water-conducting cells. d. It nourishes the embryo in seed plants.

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The appearance of cuticle and stomata correlated with what event in the evolution of green plants? a. the first upright growth forms b. the first woody tissues c. growth on land d. the evolution of the first water-conducting tissues

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Evaluate the following statements regarding seeds. Select True or False for each statement. T/F They contain an embryo. T/F They contain nutritive tissue for the embryo. T/F They consist entirely of diploid cells. T/F They are also referred to as spores.

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What does it mean to say that a life cycle is gametophyte dominant versus sporophyte dominant?

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Soils, water, and the atmosphere are major components of the abiotic (nonliving) environment. Describe how green plants affect the abiotic environment in ways that are advantageous to humans.

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