mistake deck

Question 1

What are the products of respiration in green plants?

A) glucose and co2
B) glucose and oxygen
C) water and co2
D) water and oxygen

Answer 1

Ans
C) water and co2
RESPIRATION AND PHOTOSYNTHESIS ARE NOT THE SAME THING FOOL

Question 2

In which natural cycles do photosynthesis and respiration both play a part?

A) carbon cycle and water cycle
B) carbon cycle only
C) water cycle only
D) none

Answer 2

Ans
A) carbon and water cycle

Question 3

In an ecosystem, what happens to most of the chemical energy in the decomposers?

A) It becomes heat.
B) It is transferred back to the producers.
C) It is transferred back to both producers and consumers.
D) It is destroyed.

Answer 3

Ans
A) it becomes heat

Question 4

State what happens to energy when it leaves an ecosystem, such as the African grassland.

Answer 4

lost to environment

Question 5

Explain why there are no more than a set no of trophic levels in an ecosystem

Answer 5

most energy from the sun not available
energy is lost between trophic levels
energy is lost in respiration
hence not enough energy to support another trophic level

Question 6

In a pyramid of numbers, what does the top of the pyramid represent?

A carnivores
B decomposers
C herbivores
D Sun

Answer 6

Ans
A) carnivores

Question 7

how many decomposers are there in this food chain

rice plant → caterpillar → song bird → hawk

Answer 7

0

Question 8

what is another name for diffusion

Answer 8

movement of molecules

Question 9

what causes the diffusion of oxygen into a plant cell

Answer 9

movement of molecules

Question 10

what is NOT a feature of hydrophytes

A) large air spaces in tissues
B) leaves rolled up and covered with hair
C) leaves with stomata on upper surface
D)roots and xylem reduced

Answer 10

ans - B

Question 11

the diagram shows organisms feeding on a dead rat and one of the organisms which, in turn, feeds on them
what is needed to complete the food chain?

A) canivore
B) consumer
C) predator
D) producer

Answer 11

ans - D

Question 12

which stages of genetic engineering involve the formation of sticky ends

Answer 12

isolation using restriction enzymes
DNA of a bacterial plasmid is cut open using restriction enzyme

Question 13

eutrophication causes the death of fish
what is the direct cause of the death of the fish

A) decomposers reduce the amount of dissolved oxygen
B) nitrates are toxic to plants
C) the rapid growth of producers uses up all the available nutrients
D) the sudden increase in the number of bacteria increases the spread of disease

Answer 13

ans - A

Question 14

physical difference between shape of palisade cell and epithelial cell

Answer 14

epithelial cells have an irregular shape

Question 15

what is the use of a stirrer in a fermenter

Answer 15

keeps microorganisms from sinking

Question 16

what is the use of a water-filled jacket in a fermenter

Answer 16

maintains temperature

Question 17

what are the use of probes in fermenter

Answer 17

detect pH

Question 18

why do the air and nutrients which are added to the fermenter need to be sterile

Answer 18

to avoid contamination

Question 19

function of magnesium in plants

Answer 19

making chlorophyll

Question 20

effect of lack of nitrate in plant

Answer 20

poor growth of plants

Question 21

describe how dna can be used to classify organisms

Answer 21

sequence of bases in DNA are used
base sequences which are more similar are more closely related

Question 22

explain the problems that may occur as sickle-celled red blood cells flow through the body

Answer 22

less oxygen supplied to tissues
less carbon dioxide taken away from tissues
less energy produced from aerobic respiration in tissues
red blood cells can get stuck in capilaries