Biology

Question 1

What are the characteristics of life?

Answer 1

1. Movement
2. Sensitivity
3. Reproduction
4. Respiration
5. Excretion
6. Nutrition
7. Growth

Question 2

What is the definition of Growth?

Answer 2

Organisms increase there size/mass over time.

Question 3

What is the definition of sensitivity?

Answer 3

Organisms respond to external conditions in order to optimise there condition.

Question 4

What is the definition of reproduction?

Answer 4

Organisms produce new “copies” of themselves in order to continue species.

Question 5

What is the definition of resperation?

Answer 5

organisms use glucose and oxygen to release energy for biological processes.

Question 6

What is the definition of nutrition?

Answer 6

organisms absorb chemicals which are needed for biological processes.

Question 7

What is the definition of Exertion?

Answer 7

Organisms remove waste products from there bodies.

Question 8

What is the definition of Movement?

Answer 8

Organisms change the positions of there bodies.

Question 9

What are the different types of invertebrates?

Answer 9

1. Echinoderns
2. Arthropods
   . insects
   . arachnids
   . crustaceans
   . myriapods
3. Mollusc
4. Cnidarian
5. Annelids
6. Sponges

Question 10

What are the characteristics for mammals?

Answer 10

Have fur, produce milk, give birth to live young.

Question 11

What are the characteristics for reptiles?

Answer 11

Lay eggs on land, no fur or feathers.

Question 12

What are the characteristics for birds

Answer 12

Have feathers, hollow bones, lay eggs

Question 13

What are the characteristics for amphibians?

Answer 13

have larva stage, reproduce in water, breathe through skin.

Question 14

What are the characteristics for fish?

Answer 14

Have fins, absorb oxygen through gills, live in water, lay eggs without shells.

Question 15

What are the different parts of a leaf?

Answer 15

1. epidermis
2. cuticle (waterproof layer)
3. palisade cells
4. spongy mesophyll
5. air gap
6. pores
7. stomata

Question 16

What is the role of the epidermis and cuticle?

Answer 16

They prevent water loss through the top of the leaf and protect it from disease.

Question 17

What is the role of the palisade cells?

Answer 17

They preform preform photosynthesis, contain many chloroplasts.

Question 18

What is the role of the spongy mesophyll and air gap?

Answer 18

Allow the diffusion of co2 to palisade cells.

Question 19

What is the role of the pores and stomata?

Answer 19

open and close to allow air in and out. open during the day to let in c02. Close at night to prevent water loss.

Question 20

What is continuous and discontinuous variation?

Answer 20

Continuous = Can have any numerical value (within reason).
Discontinuous = has only a few fixed values.

Question 21

What is the role of the Nucleus?

Answer 21

Controls the cell (contains DNA)

Question 22

What is the role of the cell membrane?

Answer 22

Allows chemicals in and out.

Question 23

What is the role of the cell wall?

Answer 23

Protects cell, gives structure.

Question 24

What is the role of the chloroplast

Answer 24

Does photosynthesis.

Question 25

What is the role of the mitochondrion?

Answer 25

power house of cell (preforms respiration)

Question 26

What is the role of the cytoplasm?

Answer 26

Where reaction happens.

Question 27

What is the role of the vacuole?

Answer 27

where water is stored.

Question 28

how many chromosomes do humans have?

Answer 28

Humans have 46 chromosomes/ 23 PAIRS of chromosomes.

Question 29

What is a gene?

Answer 29

A section of DNA that controls one feature. (inside chromosomes)

Question 30

What are chromosomes?

Answer 30

DNA is arranged in structures called chromosomes. The more complicated, the more chromosomes they have.

Question 31

What is a base?

Answer 31

Genes consist of of 4 chemicals (base) arranged in different patterns.
A, C, G, T.

Question 32

What is evolution?

Answer 32

Evolution is a process that causes organisms to change over multiple generations. This occurs due to natural selection where some organisms are better suited and more likely to survive.