The nature and variety of living organism

Question 1

MRS C GREN

Answer 1

movement
respiration
sensitivity
control
growth
reproduction
excretion
nutrition

Question 2

autotroph

Answer 2

organisms that create their own food for energy by photosynthesis.

Question 3

heterotroph

Answer 3

organisms that consume other organisms to obtain energy.

Question 4

aerobic respiration formula

Answer 4

glucose + oxygen = carbon dioxide + water

Question 5

what are three waste products of excretion in animals?

Answer 5

Carbon dioxide from respiration
Water from respiration and other chemical reactions
Urea which contains nitrogen resulting from the breakdown of proteins

Question 6

waste products excreted by plants

Answer 6

Oxygen from photosynthesis
Carbon dioxide from respiration
Water from respiration and other chemical reactions

Question 7

what are the 4 eukaryotic organisms

Answer 7

fungi, plant, animals and protoctist

Question 8

what are the 2 types of prokaryotic organisms

Answer 8

virus and bacteria

Question 9

what are the main features of animals

Answer 9

They are multicellular
Their cells contain a nucleus with a distinct membrane
Their cells do not have cellulose cell walls
Their cells do not contain chloroplasts (so they are unable to carry out photosynthesis)
They feed on organic substances made by other living things
They often store carbohydrates as glycogen
They usually have nervous coordination
They are able to move from place to place

Question 10

nucleus

Answer 10

stores the genetic material (DNA) which controlls the activities of the cell.

Question 11

cytoplasm

Answer 11

slimy substance where most of the chemical reactions inside the cell take place, including anaerobic respiration

Question 12

cell membrane

Answer 12

holds the cell together, and controls which substances go in and out of the cell.

Question 13

ribosome

Answer 13

organelle found in the cytoplasm which the site of protein synthesis.

Question 14

mitochondria

Answer 14

site of aerobic respiration, where energy is released to fuel cellular processes.

Question 15

what are the main features of plants?

Answer 15

They are multicellular
Their cells contain a nucleus with a distinct membrane
Their cells have cell walls made out of cellulose
Their cells contain chloroplasts (so they can carry out photosynthesis)
They feed by photosynthesis
They store carbohydrates as starch or sucrose
They do not have nervous coordination
A typical plant cell, IGCSE & GCSE Biology revision notes

Question 16

cell wall

Answer 16

gives cell extra support, defining its shape.

Question 17

chloroplasts

Answer 17

contains green chlorophyll pigments to absorb light energy and the enzymes needed for photosynthesis