Question 1

Which of the following best describes a synapomorphy in a cladistic analysis?

Accepted Answer

A derived trait shared by two or more taxa and their most recent common ancestor, but not present in more distant ancestors.

Question 2

A botanist is constructing a phylogenetic tree using the principle of parsimony. What does this principle state?

Accepted Answer

The simplest tree, requiring the fewest evolutionary changes, is preferred.

Question 3

Which of the following is an example of homoplasy?

Accepted Answer

The presence of wings in both bats and birds, which evolved independently.

Question 4

Which of the following statements about monocots and dicots is correct?

Accepted Answer

Monocots have one cotyledon, while dicots have two.

Question 5

Which plant tissue system is primarily responsible for the transport of water and nutrients?

Accepted Answer

Vascular tissue system

Question 6

A plant is observed to have a tap root system. Which of the following is most likely true about this plant?

Accepted Answer

It is a eudicot, such as a carrot.

Question 7

Which of the following best explains why damage to the phloem can kill a tree?

Accepted Answer

Phloem transports sugars from sources to sinks; damage prevents energy from reaching non-photosynthetic tissues.

Question 8

Which equation best represents the process of photosynthesis in plants?

Accepted Answer

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2$$

Question 9

Which of the following is a function of the apical meristem in plants?

Accepted Answer

Producing new cells for primary growth at the tips of roots and shoots.

Question 10

A plant hormone is applied to a growing seedling, causing it to bend toward a light source. Which hormone is most likely responsible for this response?

Accepted Answer

Auxin

Question 11

Which of the following best describes the alternation of generations in plants?

Accepted Answer

Plants alternate between haploid gametophyte and diploid sporophyte stages.

Question 12

Which of the following is a major difference between gymnosperms and angiosperms?

Accepted Answer

Angiosperms produce flowers and fruits, while gymnosperms do not.

Question 13

Which process is responsible for the movement of water from the roots to the leaves in tall trees?

Accepted Answer

Transpiration pull due to evaporation from leaf surfaces

Question 14

A researcher finds a plant that obtains nitrogen by digesting insects. Which adaptation is this an example of?

Accepted Answer

Carnivory

Question 15

Which of the following best explains why fruits are often sweet and colorful?

Accepted Answer

To attract animals that aid in seed dispersal.

Question 16

Which of the following is a correct description of double fertilization in angiosperms?

Accepted Answer

One sperm fertilizes the egg, and another sperm fertilizes the central cell to form endosperm.

Question 17

Which of the following is a function of phytochromes in plants?

Accepted Answer

Detecting red and far-red light to control flowering and seed germination.

Question 18

Which of the following best describes the role of root hairs in plant nutrition?

Accepted Answer

They increase the surface area for water and mineral absorption.

Question 19

A plant is exposed to continuous blue light. Which response is most likely to occur?

Accepted Answer

The plant will exhibit phototropism, bending toward the light source.

Question 20

Which of the following best explains why seed dormancy is important for plants?

Accepted Answer

It ensures that seeds germinate only under favorable environmental conditions.

Comprehensive Study Guide: Plant Biology, Cladistics, and Plant Physiology

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