Cells and Classification - YEAR 7

Question 1

What are all living things made of?

Answer 1

Cells - Unicellular or multicellular.

Question 2

Why and how do cells respire?

Answer 2

Cells respire to release energy from sugars. The carbon dioxide produced is a waste product.

Question 3

How do you test for the presence of Carbon dioxide?

Answer 3

Pass through limwater

Question 4

Who was Robert Hooke and what is his contribution in the field of Biology?

Answer 4

Robert Hooke was one of the first men to build and make a microscope which he used to look at cells.

Question 5

What is the purpose of a cell membrane?

Answer 5

Cell membrane controls what goes in and out of the cell and is found in both animal and plant cells.

Question 6

What is a cytoplasm?

Answer 6

Cytoplasm fills the cell, it is the site of the cell’s reaction and is found both in plants & animals cells.

Question 7

What is a nucleus?

Answer 7

A nucleus controls the cell’s functions, it contains the hereditary material (DNA) and is found in both animal and plant cells.

Question 8

What are chloroplasts?

Answer 8

Chloroplasts contain chlorophyll to trap light for photosynthesis ( food production ) and are found in the green parts of plants.

Question 9

What is a vacuole?

Answer 9

Vacoule is a bag of salty, sugary water (cell sap) which helps support plant cells.

Question 10

What are sperm cells and what are their features?

Answer 10

Sperm cells are male sex cells carrying the DNA of one parent. The head contains genetic information and an enzyme to help penetrate the egg cell membrane. The middle section is packed with mitochondria for energy. The tail moves the sperm to the egg.

Question 11

What are red blood cells and what are their features?

Answer 11

Red blood cells are tiny disc shaped cells without a nucleus which contains haemoglobin. The thin outer membrane lets the oxygen diffuse through easily while the shape increases the surface area to allow more oxygen to be absorbed efficiently.

Question 12

What are the features of White blood cells?

Answer 12

White Blood cells are cells with a large single or lobed nucleus which fight bacteria, produce antibodies and give immunity to disease.

Question 13

What are the features of neurones?

Answer 13

Neurones are cells with long extensions called axons which are insulated by a fatty layer and carry electrical impulses.

Question 14

What are the features of pollen?

Answer 14

Pollen is the male sex cell of flowering plants and transports the hereditary material of the plant.

Question 15

What are the features of root hair cells?

Answer 15

These are cells with increased surface area for taking in water for the plant.

Question 16

What is cell division? and how is the DNA involved in he same?

Answer 16

Making new cells is called Cell division. A copy of the DNA is made before the cell divides, so each new cell is identical to the original cell.

Question 17

What is the difference between vertebrates and invertebrates?

Answer 17

Vertebrates are animals with backbones while invertebrates are animals without backbones.

Question 18

State all 7 characteristics of living things?

Answer 18

movement, respiration, sensitivity, nutrition (feeding), excretion, reproduction and growth

Question 19

When does movement happen?

Answer 19

Movement maybe in response to stimulus.

Question 20

Define respiration?

Answer 20

Respiration is the release of energy from the breakdown of glucose.

Question 21

Define sensitivity?

Answer 21

Sensitivity is a response to the organism’s environment.

Question 22

Define nutrition?

Answer 22

It is a way in which living organisms obtain their food.

Question 23

Define excretion?

Answer 23

It is the removal of waste produced by an organism’s chemical reaction.

Question 24

Define reproduction?

Answer 24

It is the production of new plants & animals

Question 25

Define growth?

Answer 25

It is the development of organisms, making them bigger and heavier.

Question 26

Classify Vertebrates?

Answer 26

They are mammals, birds, fish, reptiles and amphibians.

Question 27

What are mammals?

Answer 27

Mammals are creatures whose bodies have hair, the young develop inside the mother are are fed on milk after birth, live on land, in water and in the air, wal, swim or fly.

Question 28

What are the characteristics of Birds?

Answer 28

Birds are creatures whose bodies are covered in feathers , have wings, live on land and in air and lay hard shelled eggs.

Question 29

What are the characteristics of Fish?

Answer 29

Fish are creatures whose bodies are covered in scales, live in water, swim, lay eggs in water and have gills to breathe.

Question 30

What are the characteristics of Reptiles?

Answer 30

Reptiles are creatures that have a dry waterproof skin with scales, mostly live on land, some can swim, some have legs, some slide along the ground and lay soft shelled eggs on land.

Question 31

What are the characteristics of Amphibians?

Answer 31

Amphibians are creatures whose bodies are slimy, live on land or land and in water. They lay eggs in water and can swim, walk or hop.

Question 32

What is classification?

Answer 32

Classification is a way that living things are divided into groups with similar features.