Biology Quiz 3

Question 1

organisms that can make their own food

Answer 1

autotrophs

Question 2

organisms that cannot make their own food but must obtain it from other organisms

Answer 2

heterotrophs

Question 3

the process by which plants make food

Answer 3

photosynthesis

Question 4

the two phases that make photosynthesis possible

Answer 4

light reactions and dark reactions

Question 5

carbon dioxide molecules from the air are combined with hydrogen atoms to produce; a simple sugar

Answer 5

glucose

Question 6

enables the plant to “burn” sugars as fuel for energy

Answer 6

cellular respiration

Question 7

much of the glucose produced is converted for transport to the rest of the plant

Answer 7

sucrose

Question 8

most plants store excess sugars by converting it to

Answer 8

starch

Question 9

what is the single most important factor affecting photosynthesis

Answer 9

is the light striking the leaf

Question 10

what layer does the leaf get cut off from the stem

Answer 10

abscission layer

Question 11

what weakens the cell walls of the abscission layer; allowing the leaf to break off under its own weight

Answer 11

cellulase

Question 12

the process by which plants lose water vapor through its leaves and stem; most of the water that is lost is due to this

Answer 12

transpiration

Question 13

the water within the guard cells produce a pressure called

Answer 13

turgor pressure

Question 14

what is high rate of transpiration

Answer 14

wilting

Question 15

occurs when transpiration takes place faster than the roots can absorb soil water, causing the plant cells to lose their turgor

Answer 15

temporary wilting

Question 16

resulting in the loss of leaves or even the death of the plant, can occur when there is a drought and there is not sufficient soil water to replace that lost by transpiration

Answer 16

permanent wilting

Question 17

is one that has a special design for a special task.

Answer 17

a special leaf