cell diversity

Question 1

what is a tissue

Answer 1

a group of similar cells that are adapted to carry out the same function

Question 2

what are the 4 main types of plant tisues

Answer 2

1. dermal
2. vascular
3. ground
4. meristematic

Question 3

what is a dermsl tissue

Answer 3

a single layer of cells that surrounds the different parts of plants

Question 4

an example of a dermal tisssue

Answer 4

epidermis

Question 5

what do epidermis cells have

Answer 5

a waterproof layer called a cuticle on its outer surface

Question 6

what is the function of a dermal tissue

Answer 6

is to protect the plant also to prevent water loss from thr plant

Question 7

what does the vascular tissue do

Answer 7

transports materials around a plant

Question 8

what two cells does the vascular tissue consist of

Answer 8

xylem and phloem

Question 9

what is the structure of the xylem

Answer 9

consits of hollow tubes travelling continuously from the roots to the leaves

Question 10

what is the main function of the xylem

Answer 10

to transport water and dissolved minerals

Question 11

what does the phloem cosist of

Answer 11

a series of tube like structures found in leavesstems and roots of plants

Question 12

what is the function of the phloem

Answer 12

to transport food from the leaves to other parts of the plant

Question 13

what are the 4 main types of animal tissues

Answer 13

1. epithelial
2. connective
3. muscular
4. nervous

Question 14

what is connective tissue

Answer 14

a tissue that consits of a number of diffrent types of cells spread out in a matrix

Question 15

an example of a connective tissue and explain

Answer 15

blood because it consists of red cells, white cells and platelets suspended in a matrix called plasma

Question 16

what is the function of the nervous tissue

Answer 16

carries messages to and from the brain and spinal cord

Question 17

what are nervous tissues composed of

Answer 17

nerve cells called neurons

Question 18

what are neurons

Answer 18

they are special cells that are adapted to carry electrical signals

Question 19

what is tissue culture

Answer 19

the growth of cells in or on a sterile nutrient medium outside an organism

Question 20

what is it called if it is grown in glassware

Answer 20

in vitro

Question 21

what are the conditions needed for tissue growth (4)

Answer 21

1.sterile conditions
2.energy source (food)
3.growth hormones
4.optimum temperature

Question 22

what are the apllications of tissue culture (3)

Answer 22

1.microprpagation
2.cancer research
3. skin grafts

Question 23

what is microproagation

Answer 23

is the growth of large numbers of plants from very small plant peices eg cells or tissues

Question 24

what are the benefits of micropropagation (3)

Answer 24

1. a large number of plants are produced in a short time
2. the plants are genetically identical
3. there is no need for pollinators or seeds

Question 25

what is skin graft

Answer 25

growth of new skin for patients who have been badly burned

Question 26

what is an organ

Answer 26

a structure composed of a number of tissues that work together to carry out one or more functions

Question 27

what three tissues does the leaf contain

Answer 27

1. dermal 2. vascular 3. ground

Question 28

what four types of tissue does the heart contain

Answer 28

1. muscular 2. epithelial 3. connective 4. nervous

Question 29

what is an organ system

Answer 29

consists of a number of organs working together to carry out one or more functions

Question 30

what is biological organisastion

Answer 30

is the way in which living things are organised