B4

Question 1

What is zonation?

Answer 1

It is the gradual change in species distributed across a habitat.

Question 2

What can the distribution of organisms be mapped using?

Answer 2

A transect line and displayed using a kite diagram

Question 3

Capture-recapture data assumes what?

Answer 3

🐸no deaths, immigration,
/emigration
🐸identical sampling methods
🐸survival rates not affected by marking organisms

Question 4

What are limiting factors in photosynthesis?

Answer 4

Carbon dioxide, light and temperature

Question 5

_________ experiments showed that oxygen comes from water.

Answer 5

i Isotope

Question 6

How are leaves adapted for efficient photosynthesis?

Answer 6

🍃large surface area
🍃thin 
🍃contain pigments: xanthophyll, carotene and chlorophyll    
🍃vascular bundles
🍃guard cells 
🍃waxy cuticle reduces water loss

Question 7

What are the two stages in photosynthesis?

Answer 7

🌞light energy splits water into oxygen gas and hydrogen ions

🌞carbon dioxide gas combines with hydrogen to make glucose and water

Question 8

What is the balanced symbol equation for photosynthesis?

Answer 8

6CO2 + 6H2 –> C6H12O6 + 6O2

Question 9

Define diffusion

Answer 9

Diffusion is the net movement of particles from a high concentration to a low concentration.

Question 10

How is the rate of diffusion increased?

Answer 10

By a shorter distance, a greater concentration and a greater surface area.

Question 11

Define transpiration

Answer 11

Transpiration is the evaporation and diffusion of water from leaves.

Question 12

How is the rate of transpiration increased?

Answer 12

By increased light intensity, temperature (increases enzyme action), air movement and decrease in humidity.

Question 13

Define osmosis

Answer 13

Osmosis is the net movement of water from a high to a low water concentration across a partially-permeable membrane.

Question 14

How are minerals absorbed?

Answer 14

Active transport which needs energy

Question 15

What do detritivores feed on?

Answer 15

They feed on dead and decaying material

Question 16

Hello ?

Answer 16

Is it me you’re looking for .. 🌚

Question 17

________________ use extracellular digestion.

Answer 17

i Saprophytic fungi

Question 18

What improves the efficiency of energy transfer?

Answer 18

Intensive food production

Question 19

What are the advantages and disadvantages of hydroponics?

Answer 19

Adv: better control of minerals and water
Dis: lack of support

Question 20

What are the advantages and disadvantages of biological control?

Answer 20

Adv: no chemical pesticides
Dis: introduced predator may become pest

Question 21

Organic farming uses what?

Answer 21

🌾manure
🌾crop rotation
🌾weeding
🌾differing planting times

Question 22

Plants require __________ for cell growth, _____________ for respiration and growth, and ____________ for photosynthesis.

Answer 22

i nitrates
ii phosphates
iii potassium
iiii magnesium

Question 23

What does a large variety of plants and animals in a natural ecosystem mean?

Answer 23

good biodiversity

Question 24

What is poor biodiversity?

Answer 24

Artificial ecosystems

Question 25

What can simple sugars such as glucose be used in?

Answer 25

🌀respiration, releasing energy
🌀converted into cellulose to make cell walls
🌀converted into proteins for growth and repair
🌀converted into starch, fats and oils for storage

Question 26

How are the ‘cells’ in the leaves adapted for efficient photosynthesis?

Answer 26

• the outer epidermis lacks chloroplast and so is transparent; no barriers to the entry of light
• upper palisade cell contains most of the leafs chloroplast as that part of the leaf will receive most of the light
• the spongy mesophyll cells are loosely spaced so diffusion can take place

Question 27

What is turgor pressure?

Answer 27

It supports the cell stopping it from collapsing.

Question 28

What is meant by the term ‘plasmolysed’?

Answer 28

When the cell loses water and the cells contents shrink and the cell is ‘flaccid’.

Question 29

What is meant by the term ‘turgid’?

Answer 29

A plant cell full of water.

Question 30

What is meant by the term ‘lysis’?

Answer 30

When too much water enters an animal cell it swells up and bursts.

Question 31

What is meant by therm ‘crenation’?

Answer 31

When too much water leaves an animal cell and it shrinks.

Question 32

What do xylem cells carry?

Answer 32

Water and minerals from the roots to the leaves and are involved in transpiration.

Question 33

What do phloem cells carry?

Answer 33

Food substances such as sugars up and down stems to growing and storage tissues and are involved in translocation.

Question 34

Keep that focus..

Answer 34

Control your mantras dude ✌️👳

Question 35

Lack of nitrate causes: _______________________________
Lack of phosphates causes: _______________________________
Lack of potassium causes: _______________________________
Lack of magnesium causes: _______________________________

Answer 35

i poor growth and yellow leaves.
ii poor root growth and discoloured leaves.
iii poor flower and root growth and discoloured leaves.
iiii yellow leaves.

Question 36

What does mineral uptake involve?

Answer 36

Active transport

Question 37

What can Capture-re capture data can be used to calculate?

Answer 37

Population size estimates.