Unit 5 Plants

Question 1

carbohydrate

Answer 1

a molecule that contains only molecules of carbon, hydrogen and oxygen in a ration of 1:2;1

Question 2

meristematic tissue (meristem)

Answer 2

tissue consisting of dividing undifferentiated cells (meristematic cells) found in areas of the plant where growth can take place

Question 3

cotyledon

Answer 3

a structure in the seeds of flowering plants that stores nutrients

Question 4

chloroplast

Answer 4

an organelle found in large numbers in many plant cells; the site of photosynthesis within a plant cell

Question 5

photopigment

Answer 5

a pigment that undergoes a physical or chemical change in the presence of light

Question 6

blade

Answer 6

the flat part of a leaf

Question 7

petiole

Answer 7

the stalk that attaches the leaf blade to the plant stem

Question 8

venation

Answer 8

the arrangement of veins within a leaf

Question 9

mesophyll

Answer 9

the photosynthetic middle layer of cells in the leaf a terrestrial plant

Question 10

palisade mesophyll

Answer 10

the layer of elongated photosynthetic cells arranged in columns under the upper surface of the leaf on a terrestrial plant; part of the mesophyll

Question 11

spongy mesophyll

Answer 11

the layer of loosely packed photosynthetic cells with large air spaces in between them under the lower surface of a leaf on a terrestrial plant; part or the mesophyll

Question 12

stoma

Answer 12

a small opening in the epidermis of a plant that allows gas exchange

Question 13

guard cell

Answer 13

one of 2 kidney shaped cells that control the opening and closing of the stoma

Question 14

aerenchyma

Answer 14

tissue composed of loosely packed parenchyma cells with large pores; found in aquatic plants

Question 15

psychotropic

Answer 15

mind-altering