Chapter 13: Plant Systems and Homeostasis Flashcards Preview

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Flashcards in Chapter 13: Plant Systems and Homeostasis Deck (22):
1

germination

the process by which the plant embryo emerges from the seed

2

geotropism

growth in response to gravity (the plant grows downwards first)

3

coleoptile

a protective sheath that covers the meristem of young monocots; the first part of a monocot to emerge from the ground during germination

4

sap

a fluid containing sucrose, some minerals, and organic molecules that is transported through plants

5

apical meristem

a region of embryonic, undifferentiated cells that actively divide allowing the plant to grow in length

6

suberin

a waxy, waterproof substance found in plants

7

vascular ray

channels materials from the phloem to the center of the stem

8

bark

the layer of a dicot stem consisting of phloem, cork cambium, and cork

9

homeostasis

maintaining a stable internal environment

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behavior

responding to a stimulus

11

thigmotropism

directional growth in response to physical contact

12

phototropism

growth towards light

13

gravitropism/geotropism

growth in response to gravity

14

signal-transduction

a method of generating a cellular response by means of a chemical or physical stimulus

15

auxin

a group of plant hormones involved in cell elongation and plant growth

16

circadian rhythm

a physiological cycle, about 24 hours in length, that is present in all eukaryotes

17

photoperiodism

a physiological response to day length

18

behavior

response to a stimulus

19

transpiration

the loss of water through evaporation from a leaf

20

plasmodesmata

open channels in plant cell walls connecting adjacent channels together

21

hyphae

thin, hairlike filaments that form the body of a fungus

22

hypertonic

a solution with a higher concentration of solute than another