Life processes

Question 1

What are the seven life proceses?

Answer 1

Mrs Gren:
Movement
Reproduction
Sensitivity
Growth
Respiration
Excretion
Nutrition

Question 2

What is biology?

Answer 2

It is the study of all living things and living organisms.

Classified in 5 kingdoms (name them)

Question 3

Describe nutrition
(name definition, nutrition in plants and animals and their characteristics)

Answer 3

Nutrition is the absorption of food to provide energy and substances needed for growth, development and repair. They are compounds that may be large and complex or simple.
Nutrition in green plants involves photosynthesis, in which energy from the sunlight is absorbed and used to turn carbon dioxide and water into simple sugars. Plants convert these simple sugars into complex compunds, such as cellulose and protein. Mineral ions from the soil are needed to make proteins.
Animals eat plants or other animals to gain energy and nutrients. Food is digested, absorbed into the blood and assimilated by cells for growth and repair. Food which is not digested and absorbed is egested in faeces.

Question 4

what is ingestion?

Answer 4

the process of taking in food

Question 5

what is respiration? brief explanation

Answer 5

all living organisms respire because they all need energy. Respiration involves chemical reactions that occur in cells to break down nutrients to release energy.
alternative definition: is the release of energy from food that happens in all living organisms

Question 6

word equation for respiration involving oxygen

Answer 6

glucose + oxygen —> carbon dioxide + water + energy released

Question 7

What is movement?

Answer 7

causes an organism to change its position or place.

alternative definition: organisms move themselves or part of themselves into new areas to change position.

Question 8

movement in plants

Answer 8

plants move slowly when they grow. their roots move down into the soil and their leaves and stems move up towardss the light. leaves can move to face the sun so they can absorb as much light as possible

Question 9

movement in animals

Answer 9

they move to obtain food or to avoid being caught by predators.

Question 10

what does growth involve?

Answer 10

it always involves making more complex chemicals which is why the dry mass increases

Question 11

brief explanation of what growth is. also growth in animals and plants

Answer 11

growth is the permanent increase in size of an organism. plants carry on growing throughout their lives. Animals stop growing once they reach a certain size

Question 12

what is metabolism?

Answer 12

metabolism is all the chemical reactions that occur in an organism. respiration is a major part of metabolism

Question 13

explain excretion

Answer 13

all living organisms produce toxic waste substances as a result of metabolism. excretion is the removal of these waste materials and substances in excess of requirements from the body.

Question 14

excretion in plants

Answer 14

plants store waste substances in their leaves, so the waste materials are removed when the leaves fall off.

Question 15

excretion in animals

Answer 15

animals breathe out carbon dioxide. other waste substances leave the body in the urine.

Question 16

state the difference between excretion and egestion

Answer 16

excretion is the removal of metabolic waste. egestion is food which has passed through the gut without being digested.

Question 17

what is stimuli?

Answer 17

a change in the invironment that is detected by a sense organ.
alternative: the change in the internal and external environment that living organisms are able to detect or sense.

Question 18

what is sensitivity?

Answer 18

is being able to detect and respond to stimuli.

Question 19

how is sensitivity in plants?

Answer 19

plants respond to movement of the sun by moving their leaves to face the light. the flowers of some plants open in the morning and close at night

Question 20

how is sensitivity in animals?

Answer 20

animals have sensory cells and sense organs for detecting light, sound, touch, pressure and chemicals in the air and food

Question 21

describe reproduction

Answer 21

reproduction results in the formation of new individuals.

Question 22

asexual reproduction

Answer 22

involves one parent giving rise to offspring that are often identical to each other and to the parent

Question 23

sexual reproduction

Answer 23

involves two parent organisms producing gametes (sex cells) which fuse to give rise to the next generation, the offspring show variation and are not identical to their parents.

Question 24

state the difference between breathing and respiration

Answer 24

breathing is the action of inhaling and exhaling and respiration is a process that releases energy in all living things

Question 25

name three different activities for which we need food

Answer 25

growth, movement and thinking

Question 26

what is the difference between something dead and a non-living object?

Answer 26

something dead had an organism and moved. While a non-living object doesn’t move, reproduct or live. Also it doesn’t have an organism.

Question 27

give two examples of each life processes

Answer 27

movement: a girl dancing, a boy playing football
respiration: a boy running, a girl doing exercise
sensitivity: a girl watching the news, a woman driving
growth: puberty, a boy on his birthday
reproduction: a pregnant woman, a dolphin having her baby
excretion: a dog urinating, the leaf of a tree falling
nutrition: a girl eating fruit, a boy drinking orange juice

Question 28

Say the difference between respiration and breathing

Answer 28

Respiration is the release of energy from food that happens in all the living cells in the body. Breathing happens in árganos, such as gills or lungs