Question 1

Based on the diagram of plant transport, which process is primarily responsible for moving water from the roots to the leaves?

Accepted Answer

Transpiration-driven bulk flow

Question 2

Which equation best describes the relationship between water potential ($$\Psi$$), solute potential ($$\Psi_s$$), and pressure potential ($$\Psi_p) in $$plant cells?

Accepted Answer

$$\Psi = \Psi_s + \Psi_p$$

Question 3

A plant experiencing drought stress will most likely show which change in carbon uptake?

Accepted Answer

Decreased carbon uptake due to closed stomata

Question 4

Which cell type is directly involved in regulating gas exchange in leaves?

Accepted Answer

Guard cells

Question 5

Which of the following is a derived trait that first appeared in gymnosperms according to the plant evolutionary tree?

Accepted Answer

Seeds

Question 6

In the alternation of generations, which process restores the diploid state ($$2n) in $$plants?

Accepted Answer

Fertilization

Question 7

Which of the following best describes artificial selection as shown in the Brassica oleracea diagram?

Accepted Answer

Selection by humans for desired traits

Question 8

Which tissue is responsible for transporting sugars produced in photosynthesis throughout the plant?

Accepted Answer

Phloem

Question 9

Which equation represents the process of photosynthesis in plants?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 10

Which of the following is NOT a benefit of genetically modified organisms (GMOs) in agriculture?

Accepted Answer

Guaranteed absence of environmental impact

Question 11

Which process is responsible for the movement of minerals from the soil into the root cells?

Accepted Answer

Active transport

Question 12

Which plant group is characterized by the presence of flowers and fruits?

Accepted Answer

Angiosperms

Question 13

Which statement about nitrogen-fixing bacteria is correct?

Accepted Answer

They convert atmospheric $$N_2$$ into ammonia ($$NH_3)$$

Question 14

Which of the following is a prezygotic barrier to speciation?

Accepted Answer

Temporal isolation

Question 15

Which term describes a trait that is present in a group of species but not in their ancestor?

Accepted Answer

Derived trait

Question 16

Which principle explains why water moves from the soil into plant roots?

Accepted Answer

Water potential gradient

Question 17

Which hormone is primarily responsible for closing stomata during drought stress?

Accepted Answer

Abscisic acid

Question 18

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

Accepted Answer

Alternation between haploid gametophyte and diploid sporophyte stages

Question 19

Which of the following is NOT a characteristic of vascular plants?

Accepted Answer

Lack of specialized tissues for transport

Comprehensive Study Guide for College Biology: Plant Physiology, Evolution, and Genetics

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