plants unit quiz

Question 1

Corn, rice, wheat, and other cereal grains are the _____ of grass species.

Answer 1

fruits

Question 2

Half of the protein consumed by people worldwide comes from _____.

Answer 2

cereal grains

Question 3

What serves as a major carbon sink?

Tilled fields

Clear-cut forest

Urban areas

Untilled fields

Answer 3

untilled fields

Question 4

What is not an example of a pioneer species?

Alder tree

Grass with rhizomes

Wheat

Lichen

Answer 4

wheat

Question 5

Forest areas that have been clear-cut, burned by a forest fire, or cleared for farming and then abandoned are often first colonized by

Answer 5

annual plants

Question 6

What plant structure is least likely to deter an attack by an herbivore?

Spines

Thorn

Stomata

Leaf hairs

Answer 6

stomata

Question 7

What plant tissue consists of undifferentiated cells and is present where growth is taking place?

Answer 7

meristem tissue

Question 8

What tissue is composed of specialized sclerenchyma cells, which are hollow after they have died?

Answer 8

xylem

Question 9

what is the result of secondary plant growth

Answer 9

wood

Question 10

When a gardener pinches back a basil plant, the terminal buds of the plant are removed. This reduces the ____ level compared to the cytokinin level, causing the plant to branch out more.

Answer 10

auxin

Question 11

Bean seeds will not sprout until they are watered in well or a soaking rain occurs. The water will wash the _____ out of the seeds, enabling them to break their dormancy.

Answer 11

abscisic acid

Question 12

What is an example of tropism?

The germination of a seed.

The coiling of pea tendrils.

The closing of the Venus fly trap.

The folding of Mimosa leaves.

Answer 12

The coiling of pea tendrils.

Question 13

A sickly gooseberry plant has leaf tips that look burnt, stems that are weak, and there are few berries developing. Which nutrient should be added to the soil around this plant?

Answer 13

potassium

Question 14

grafting

Answer 14

The combination of a stem and a root from two different species of plant.

Question 15

The epidermis secretes the waxy layer shown at the top of this diagram. What is it called and what is its function?

Answer 15

Cuticle; water retention

Question 16

A celery stalk is mostly _____, which are cells with large vacuoles and thin-walls, but support cells called _____ form the long strands.

Answer 16

parenchyma; collenchyma

Question 17

Bacteria living in the nodules of many legumes (and some non-legumes, like the Alder tree root nodule shown) are able to transform atmospheric nitrogen into a form that is usable by plants.

What is this process called?

Answer 17

nitrogen fixation

Question 18

The veins of a leaf consist of

Answer 18

xylem and phloem

Question 19

The function of the veins in this leaf is to

Answer 19

transport water, nutrients, sugars

Question 20

Celery stalks are actually enormous _______

Answer 20

petioles

Question 21

When a popcorn kernel pops, the _____, which surrounds the embryo and provides it with nutrition, expands rapidly into an airy foam that cools.

Answer 21

endosperm

Question 22

When a bean germinates, it takes up water and expands, splitting its seed coat. The water also triggers hormonal changes that enable it to grow.

Which hormone is involved in the process of germination?

Answer 22

gibberellins