cell diversity

Question 1

what is a tissue

Answer 1

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

Question 2

plant tissues x2

Answer 2

dermal and vascular

Question 3

function and location of the vascular tissue

Answer 3

transportation
stem of the plant

Question 4

function and location of the dermal tissue

Answer 4

protection
epidermis of leaves, stems and roots

Question 5

xylem transports

Answer 5

water and minerals

Question 6

phloem transports

Answer 6

glucose

Question 7

description of dermal tissue

Answer 7

thickened call wall to prevent water loss

Question 8

description of vascular tissue

Answer 8

complex - contains xylem and phloem

Question 9

animal tissues x2

Answer 9

connective and nervous

Question 10

function of connective tissue

Answer 10

joins and supports other body parts

Question 11

function of nervous tissue

Answer 11

carries electrical impulses from the brain

Question 12

description/adaptation of connective tissue

Answer 12

consists of a number of cells spread out in a matrix

Question 13

description/adaptation of nervous tissue

Answer 13

neurons to carry electrical impulses …?

Question 13

in vitro growth

Answer 13

growth of cells outside of the body in a nutrient medium

Question 13

tissue culture

Answer 13

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

Question 14

sterile

Answer 14

no micro organisms are present

Question 15

application of tissue culture x2

Answer 15

plant breeding = micropropagation (the growth of large numbers of plants from very small plant pieces - usually from cells that have bee taken from meristematic zones)
skin grafts
IVF

Question 16

benefits of plant breeding

Answer 16

large number is produced in a short time
inexpensive
genetically identical

Question 17

what are skin grafts

Answer 17

growing new skin for patients who have been badly burnt

Question 18

where are stem cells usually taken from

Answer 18

bone marrow or umbilical cords

Question 19

what is the benefits to skin grafts

Answer 19

there’s no need to remove skin from the body
new skin is identical and won’t be rejected by the body

Question 20

organs

Answer 20

structure composed of a number of tissues working together to carry out one or more functions e.g stomach or roots

Question 21

plant organ

Answer 21

leaf

Question 22

animal organ

Answer 22

heart

Question 23

what is an organ system

Answer 23

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

Question 24

examples of organ systems

Answer 24

circulatory system or digestive system

Question 25

requirements for a good tissue culture x3

Answer 25

1. Sterile environment 2. Nutrient medium 3. Correct ph and temperature