Biology 2a

Question 1

What three things do plant cells have that animal cells don’t?

Answer 1

Cell Wall
Permanent Vacuole
Chloroplasts

Question 2

Where is DNA found in bacterial cells?

Answer 2

In the cytoplasm because they don’t have a nucleus.

Question 3

Where is the DNA found in animal cells?

Answer 3

In the Nucleus

Question 4

What is diffusion?

Answer 4

DIFFUSION is the spreading out of particles from an area of HIGH CONCENTRATION to an area of LOW CONCENTRATION.

Question 5

Name one molecule that can diffuse through cell membranes.

Answer 5

Oxygen

Question 6

What is a tissue?

Answer 6

A tissue is a group of similar cells that work together to carry out a particular function.

Question 7

What is an organ?

Answer 7

An organ is a group of different tissues that work together to perform a certain function.

Question 8

Give one example of a plant tissue.

Answer 8

Epidermal tissue

Question 9

Give an example of a plant organ.

Answer 9

Stems

Question 10

Give one example of a tissue in the human stomach, and say what job it does.

Answer 10

Muscular tissue, this moves the stomach wall to mix up the food.

Question 11

Name one organ system found in the human body.

Answer 11

The digestive system.

Question 12

What is the green substance in leaves that absorbs sunlight?

Answer 12

Chlorophyll

Question 13

What is the equation for photosynthesis?

Answer 13

sunlight
Carbon dioxide + water —> glucose + oxygen
chlorophyll

Question 14

Name the three factors that can limit the rate of photosynthesis.

Answer 14

How much light there is
The amount of carbon dioxide
The temperature

Question 15

Explain why it’s important that a plant doesn’t get too hot.

Answer 15

The enzymes will get damaged if the temperature is over 45 C, therefore photosynthesis will not happen at all.

Question 16

Describe one thing that a farmer could do to make sure she grows a good crop of tomatoes in her greenhouse.

Answer 16

Artificial light from lamps at night

Question 17

Give two ways that plants can use the glucose produced by photosynthesis.

Answer 17

Respiration

Making cell walls

Question 18

Give three environmental factors that can affect the distribution of organisms.

Answer 18

The temperature
How much water there is
The amount of light

Question 19

Name five parts of a cell that both plant and animal cells have.

Answer 19

Nucleus
Cytoplasm
Cell membrane
Mitochondria
Ribosomes