section 2: structures and functions in living organisms a & b

Question 1

the levels of organisation within organisms:

Answer 1

organelles, cells, tissues, organs and systems

Question 2

organelles

Answer 2

highly organised structure of molecules. Are within cells and have a special function

Question 3

cells

Answer 3

basis of living things, made up of organelles. functional unit.

Question 4

tissues

Answer 4

a collection of similar cells all serving a common function

Question 5

organs

Answer 5

made up of several kinds of tissues together forming a functioning unit.

Question 6

system

Answer 6

A group of two or more organs. example: the cardivascular system, made up of heart, blood and blood vessels

Question 7

animal cell

Answer 7

contains a nucleus in the centre, surrounded by a cytoplasm, around the outside is the cell membrane

Question 8

plant cell

Answer 8

a vacuole in the centre surrounded by the cytoplasm; within this is the nucleus and chloroplasts. Surrounding this is the cell membrane and around that is the cell wall.

Question 9

compare the structures of plant and animal cells

Answer 9

Differences
Plant cells have a vacuole
Plant cells have chloroplasts
Plant cells have a cell wall

Similarities
They have a nucleus
They have cytoplasm
They have a cell membrane

Question 10

nucleus

Answer 10

contains all the genetic info in the cell, thought of as the centre. controls the cells activities.

Question 11

cytoplasm

Answer 11

surrounds the nucleus within the cell wall. where the reactions take place in the cell

Question 12

cell membrane

Answer 12

controls the movement of chemiclas in and out of the cel

Question 13

cell wall

Answer 13

made of celullose, strengthens the cell wall

Question 14

chloroplasts

Answer 14

contain chlorophyll, used in photosynthesis

Question 15

vacuole

Answer 15

keeps the cell turgid (keeping it filed with water)