b1 topic 2

Question 1

what are the five kingdom

Answer 1

animalia , plantae , fungi , protoctista , prokaryotae

Question 2

what are 2 main characteristics of prokaryotae

Answer 2

unicellular , simple cell structure with no nucleus

Question 3

explain why the duck-billed platypus is a chordate

Answer 3

chordata have a supporting rod that runs the length of their body

Question 4

what is a vertebsrate.

Answer 4

vertebrates are animals that have a backbone

Question 5

what is a invertebsrate.

Answer 5

animals that do not have a backbone

Question 6

what temperature dose the body work best at.

Answer 6

37`c

Question 7

what is a Stimulant

Answer 7

a stimulant Increases nerve and brain activity

Question 8

what dose a Performance enhancer do

Answer 8

Improves muscle development

Question 9

Living things can then be ranked according to?

Answer 9

phylum, class, order, family, genus, species

Question 10

what is a Mammal

Answer 10

Mammals have lungs and fur. Like birds, they can maintain their body temperature. Mammals reproduce by internal fertilisation and they give birth to live young they are viviparous

Question 11

Energy is needed for the life processes such as

Answer 11

growth ,cell division, muscle contraction, proteinsynthesis ,active transport,nerve impulses

Question 12

Good sources of calcium include

Answer 12

cheese eggs milk green leafy vegetables such as broccoli and cabbage

Question 13

Good sources of iron include

Answer 13

liver red meat beans and nuts dried fruits such as dried apricots

Question 14

Sources of water include

Answer 14

food, drinks, metabolic processes - such as aerobic respiration

Question 15

Sources of fibre include

Answer 15

fruit , vegetables , cereals

Question 16

A leaf needs

Answer 16

a way to transport water to the leaf, and glucose to other parts of the plant , a way to exchange carbon dioxide , oxygen the ability to absorb light energy efficiently

Question 17

Hydrogen carbonate indicator is used to show carbon dioxide concentration in solution.

Answer 17

yellow in high concentrations of carbon dioxide
red in equilibrium with carbon dioxide in the atmosphere
purple in low concentrations of carbon dioxide

Question 18

Fossils are found in rocks and can be formed from:

Answer 18

Hard body parts, such as bones and shells, which do not decay easily or are replaced by other materials as they decay.
Parts of organisms that have not decayed. For example, dead animals and plants can be preserved in amber, peat bogs, tar pits, or in ice.
Casts or impressions, such as footprints or burrows. These become covered by layers of sediment, which eventually become rock.

Question 19

Several factors can cause a species to become extinct. They include

Answer 19

new diseases
new predators
new, more successful competitors
changes to the environment over geological time, such as climate change
a single catastrophic event, such as a massive volcanic eruption or a collision between an asteroid and the Earth

Question 20

New species can arise as a result of

Answer 20

genetic variation - where each population has a wide range of alleles that control their characteristics
natural selection - where the alleles which help an organism to survive are selected in each population
speciation - where the populations become so different that successful interbreeding cannot happen anymore