Question 1

aerial stem

Accepted Answer

a stem that grows above ground.

Question 2

annual

Accepted Answer

plant species that completes its life cycle in one growing season.

Question 3

biennial

Accepted Answer

plant that lives two growing seasons.

Question 4

bulb

Accepted Answer

underground stem with layers similar to leaves; onion, tulip, and jonquil.

Question 5

compound leaf

Accepted Answer

leaf that is divided into two or more leaflets; clover, rose, and locust tree.

Question 6

corm

Accepted Answer

underground stem that is similar to a bulb, but it has thinner leaves and a thicker stem; taro, gladiolus, and garlic.

Question 7

fibrous root system

Accepted Answer

root system in which many small roots spread out through the soil.

Question 8

geotropism

Accepted Answer

downward growth of roots; a response to gravity.

Question 9

growing season

Accepted Answer

period of time after the last frost in the spring and before the first frost in the fall; measured as the number of frost-free days.

Question 10

herbaceous stem

Accepted Answer

nonwoody stem that is soft and green stem and contains only a small amount of xylem.

Question 11

irrigation

Accepted Answer

artificial application of water to meet plant growth needs.

Question 12

leaf

Accepted Answer

organ on a plant stem that is usually green.

Question 13

life cycle

Accepted Answer

sequence of changes the plant or animal goes through from its inception to reproductive maturity, includes the beginning, growth, and maturity stages of the life span.

Question 14

lodge

Accepted Answer

when a plant falls over.

Question 15

osmosis

Accepted Answer

movement of liquid from a greater concentration to a lesser concentration.

Question 16

perennial

Accepted Answer

plant that lives for more than two growing seasons.

Question 17

photoperiod

Accepted Answer

length of the light period in a day.

Question 18

phototropism

Accepted Answer

growth or turning of a plant in the direction of light.

Question 19

primary root

Accepted Answer

first root to grow from the seed.

Question 20

rhizome

Accepted Answer

long, underground stem that sends up shoots to start new plants, such as Johnson grass.

Question 21

root

Accepted Answer

part of a plant that usually grows underground.

Question 22

root hair

Accepted Answer

small, hairlike growth that helps anchor the root; root that branches off primary and secondary roots that grow between soil particles.

Question 23

root cap

Accepted Answer

tip of the primary root that protects the root as it grows into the soil.

Question 24

secondary root

Accepted Answer

root that branches from the primary root.

Question 25

simple leaf

Accepted Answer

a leaf that has only one blade; corn, oak, wheat, elm.

Question 26

stem

Accepted Answer

plant structure that supports leaves and flowers, transports water and other material, and stores food.

Question 27

subterranean stem

Accepted Answer

a part of a plant stem that grows below the ground.

Question 28

taproot

Accepted Answer

one large root that grows downward.

Question 29

thigmotropism

Accepted Answer

the growth of plants over and around solid objects, such as rocks.

Question 30

transpiration

Accepted Answer

process through which the leaves of plants give off water.

Question 31

tropism

Accepted Answer

plant movement in response to its environment.

Question 32

tuber

Accepted Answer

an enlarged underground branch or stem of a plant, such as a potato.

Question 33

woody stem

Accepted Answer

the stem of a tree, shrub, and other crop plants, such as cotton, that has rigid tissue known as xylem.

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