maintaining life

Question 1

what are plants mostly made of?
1

Answer 1

water

Question 2

how often do plants need to absorb water?
1

Answer 2

almost always

Question 3

plants absorb water from…
1

Answer 3

soil

Question 4

what absorbs the water from the soil?
2

Answer 4

root hair cells

Question 5

do root hair cells provide a big or small surface area?
1

Answer 5

big

Question 6

how many cells are the root hair cells connected to?
1

Answer 6

1

Question 7

what does water absorbed through the root hair cell pass through?
2

Answer 7

cell wall and cell membrane

Question 8

where does the water go to?
1

Answer 8

cytoplasm

Question 9

what else goes into the cytoplasm?
2

Answer 9

magnesium and nitrate

Question 10

how does magnesium and nitrate get into the water?
1

Answer 10

they dissolve in water

Question 11

are root hair cells different than other plant cells?
1

Answer 11

yes

Question 12

how does the structure of a root hair cell help carry out it’s function?
5

Answer 12

.it has a large surface area,
.which helps absorb more water
.in the same amount of time

.its cell walls are thin
.which makes it easier to absorb water

Question 13

why do plants need nitrate and magnesium ions?
2

Answer 13

magnesium is needed for chlorophyll

nitrate is needed for protein

Question 14

what transports water to the plant?
1

Answer 14

xylem cells

Question 15

what are xylem vessels?

              5

Answer 15

.long, tube-like cells
.they are dead
.all of their contents, like cytoplasm, have disappeared
. all that is left is the cell wall
.but the end cell walls have disappeared

Question 16

what happens when water reaches a leaf?
1

Answer 16

it goes from the xylem vessel to the leaf cells

Question 17

what does the chloroplast in leaf cells use water for?
1

Answer 17

phytosynthesis

Question 18

does chloroplast need a little bit of water or a lot of water?
1

Answer 18

a lot of water

Question 19

does most of the water stay in the cell?

Answer 19

no

Question 20

where does most of the water go?
2

Answer 20

it soaks
into the cell wall

Question 21

what happens to the water that soaks into the cell wall?
1

Answer 21

it turns into water vapor

Question 22

how does the water vapor get out of the leaf?
1

Answer 22

through the stomata

Question 23

the loss of water vapor is called…

Answer 23

transpiration

Question 24

why does most transpiration happen from the underside of a leaf?

Answer 24

because the top of the leaf is where most sunlight hits

the chlorophyll should be at the top of the leaf to maximize photosynthesis.

Question 25

what happens if a plant cell does not contain enough water?
2

Answer 25

it collapses

this is known as wilting

Question 26

what are the 4 reasons plants need water?
4

Answer 26

for transport
for cooling
for structure
for photosynthesis

Question 27

what does excretion mean?
3

Answer 27

getting rid of waste material

that has been part of the body

Question 28

is excretion a characteristic of every living thing?
1

Answer 28

yes

Question 29

how does something you eat become part of the body, even if for a short time?
1

Answer 29

it moves out of the digestive system

Question 30

does feces count as excretion?
1

Answer 30

no

Question 31

what does excretion include?
3

Answer 31

Carbon dioxide

urea

excess water

Question 32

where is urea made?
1.5

Answer 32

in liver cells

Question 33

how is urea made?
2

Answer 33

when we have excess protein,
the liver changes it into urea

Question 34

how does protein get to the liver?
1

Answer 34

through the blood

Question 35

What happens when you have too much urea?
2

Answer 35

since it is poisonous,
too much urea can make you ill

Question 36

what happens after urea is made in the liver cell?
2

Answer 36

it is taken away
into the blood

Question 37

what removes urea from the body?
2

Answer 37

the kidneys
in the excretory system

Question 38

what is the excretory system also known as?
1

Answer 38

the renal system

Question 39

how does urea and excess water get out of the blood?
2

Answer 39

the kidneys
filter it

Question 40

what happens to the urea when it is filtered through the liver?
3

Answer 40

it dissolves
in the water
which the kidney also filters

Question 41

when urea is dissolved into water, what is it called?
1

Answer 41

urine

Question 42

where does the urine go?
2

Answer 42

to the bladder
through the uret er

Question 43

how does urine get out of your body?
1

Answer 43

through the urethra

Question 44

why do plants not produce urea

Answer 44

Plants don’t have a well-developed excretory system like animals(humans too)

They do not have special organs for excretion.