Ch 28-30, 35-39 (Plants) Homework link


AP Biology

Chapters 28-30, 35-39 Plants and Protists


Chapter 28 Protists


Review Concept 26.4 and “the First Eukaryotes” and “Endosymbiotic Origin of Mitochondria and Plastids” and Figure 28.3 to answer the following: a.


How is the endomembrane system of eukaryotic cells thought to have evolved?

Review the evidence for the serial endosymbiotic model of eukaryotic cell evolution.

Explain the “serial” part of the hypothesis.

Explain the occurrence of multiple membranes found around the plastids of some protist groups









What is regarded as the ultimate origin of all plastids?

Describe how the origin of eukaryotes catalyzed a second great wave of diversification.

Why does systematics consider the kingdom of Protista to be an obsolete taxon? Provide specific examples as evidence to support your answer.

Using figure 28.12 describe the ways in which ciliates reproduce and also how genetic variation is introduced into the species through the process of conjugation.

Laminaria are one of the first examples of an alternation of generation life cycle (Figure 28.21). Describe what this means and how it may be a link between algae and land plants.

Cellular slime molds provide one model of how multicellularity may have evolved. Explain why this is so based upon figure 28.27.

Chapter 29 Plant Diversity I: How Plants Colonized Land





What is the evidence for the evolution of land plants from green algae? (list AND describe them)

In your own words describe what challenges and what benefits there were to the first plants living on land.

What are the 5 key traits found in nearly all land plants? (List them AND describe/explain them—you will need to read and use pages 576-577 also).

Using figures 29.8 and 29.12 answer the following questions:





Describe what a haploid moss plant looks like.

Describe what a diploid moss plant looks like.

Describe what a haploid fern plant looks like.

Describe what a diploid fern plant looks like. c.


Are the spores of moss n or 2n? Are the spores of ferns n or 2n?

Where is the archegonium in a moss? e.

Where is the archegonium in a fern?

How are both the moss and fern life cycles excellent examples of Alternation of Generations within the plant kingdom?

Why aren’t mosses considered among the group of seedless vascular plants?

Chapter 30 Plant Diversity II: The Evolution of Seed Plants

1. a. Complete the following table:

Describe (and/or sketch) the gametophyte of each of the following plant types: bryophytes

(such as moss) seedless vascular plants

(such as ferns) gymnosperms

(conifers) angiosperms

(flowering plants)

b. What is meant when the book says that gametophyte reduction was the evolutionary trend?

c. Explain why gametophyte reduction was beneficial (use the text as well as fig. 30.2).

2. a. What is heterospory?

b. Give an example of heterospory as seen in seed plants (gymnosperms or angiosperms)

3. What are at least 3 evolutionary advantages of seeds?

4. List at least 5 differences between angiosperms and gymnosperms. (use the text and the figures to help you)

5. a. Using fig 30.10 describe the 2 cells within a pollen grain (male gametophyte) AND their functions during pollination and


b. What is double fertilization?

c. Using fig 30.10 describe the 7 cells within a female gametophyte and describe what they will become after fertilization.

6. Briefly describe the differences between monocots and eudicots.

7 . a. Define coevolution.

b. Describe an example of an animal and an angiosperm that demonstrate coevolution.

Chapter 35 Plant Structure, Growth, and Development

1. This chapter calls roots, stems, and leaves organs. What are the main functions of each of these organs?

ORGANS Main functions roots stems

(draw this table onto your own paper)


2. There are three tissue systems in plants: dermal, vascular, and ground. Define and give an example of each:

Plant Tissues dermal vascular


(draw this table onto your own paper)

Example ground

3. Define primary growth and use the term ‘apical meristem’ in your definition (fig 35.18 may be helpful).

Define secondary growth and use the term ‘lateral meristem’ in your definition (fig 35.18 may be helpful).

4. What are guard cells and why are they important for photosynthesis?

and why are they important for the overall health of a plant?

(Ch 35 continued)

5. What are the following functions of these leaf structures? (fig 35.17 may help)

Leaf structures cuticle

Functions palisade mesophyll spongy mesophyll sclerenchyma fibers (see p. 718) bundle sheath vein

6. Define vascular cambium and explain where it is found.

What is the function of vascular cambium?

7. Read the text within figure 35.24. How does this figure relate to the real plants shown in fig. 35.25?

Chapter 36 Transport in Vascular Plants

1. a. Using figure 36.2 define transpiration.

b. Explain how transpiration affects water and mineral transport through the stem and into roots. (figs

36.2 and 36.13 may help)

2. Why are sugars transported down the stem in the tree in figure 36.2? (Use the information from figures 36.18 and 36.19 to help you answer this.)

3. a. Sketch and

b. Explain how and why guard cells change shape, thereby allowing the stomata to open or close.

4. Using as many vocabulary terms as possible (from Ch.36) describe the path that a CO


molecule takes as it enters the plant during daylight (through an open stomate), is transported within the plant, is assimilated into a sugar molecule (via photosynthesis), then transported within the plant (as a sugar molecule), and lastly, during respiration, as the sugar is catabolically broken back down into CO


and then eventually leaves the plant (via an open stomate).

Try to name specific parts of the plant and name/describe the various processes within the plant.

5. Define water potential. (lab 1 may also help with this topic)

6. Water moves from a region of higher Ψ(water potential) to a region of lower Ψ. How is the definition of water potential different from just plain old osmosis that we already learned about?

Chapter 37

Read/review p. 771-780 (from angiosperm lab)

Read pages 781-786 this is very interesting and current in the latest biology news but will not be directly tested.

1. Look at the various essential plant elements in Table 37.1, explain why too much water could be harmful to soil that is initially rich in these elements and minerals (remember that water is polar). (pages 759-762 may help you if

you are not sure of this question)

Chapter 38

Read pages 756-759, p.768, (review mycorrhizae, nitrogen fixation and root nodules)

1. How do the “pin” and “thrum” flower types reduce self-fertilization? (fig 38.5)

2. a. Sketch the bean seed from fig 38.8 and label the parts.

b. What was the definition of a seed? (from ch 30)

c. The light brown shading on this seed is the endosperm. Why is most of the seed endosperm?

d. What is the radicle part of the seed?

3. See figure 38.10(a). What is the hypocotyl?

Chapter 39 Plant Responses to Internal and External Signals

1. a. What is the biological definition of a hormone?

b. Read through the two scientific studies (figures 39.5 and 39.6). Auxin is the hormone that is

indirectly described in both of these studies.

What does auxin do and why is auxin considered a hormone?

2. Table 39.1. Write out a simplified definition or mnemonic that will help you remember the name of each

hormone and its major function(s).