Science 10 Flashcards
0
Q
- What are plant hormones used for?
A
- Killing weeds
- Control fruit ripening
- Stimulate plant growth
1
Q
- Where does the exchange of gases in the woody areas of plants take place?
A
Through tiny openings in the bark called lenticels
2
Q
- What is cellulose?
A
Component of plant cell walls
3
Q
- What is the function of the phloem?
A
Transports a sugar solution
4
Q
- What causes turgor pressure?
A
The presence of water inside plant cells
5
Q
- What is the name of the outermost tissue of leaves, young roots and young stems?
A
Epidermis
6
Q
- What is the name for arrangements of xylem and phloem in leaves and in nonwoody plants?
A
Vascular bundles
7
Q
- What is negative tropism?
A
Growth away from a factor
8
Q
- What are short day plants?
A
Plants that bloom when nights are long
9
Q
- List three characteristics of plants?
A
Eukaryotic
Producers
Have cell walls
10
Q
- What is the vascular cambium?
A
Growth region in plants
11
Q
- What is auxin?
A
Type of plant hormone
12
Q
- What tissues are found inside the vein of a leaf?
A
Xylem and phloem
13
Q
- Through which structure on a leaf does transpiration occur?
A
Stomata
14
Q
- In which layer of the leaf does the most photosynthesis occur and why?
A
Palisade layer because it contains tightly packed cells with lots of chloroplasts in them where photosynthesis takes place
15
Q
- Why would girdling kill a tree?
A
The phloem is removed and so food cannot be transported to the areas below the girdling.
16
Q
- What is photoperiodism?
A
Plants response to the length of time it is exposed to light.
17
Q
- What is the name for the study of plants?
A
Botany
18
Q
- Which plant tissue carries water from the roots to the leaves?
A
Xylem
19
Q
- What is the name for the the passage of water vapor out of the leaf through the stomata?
A
Transpiration
20
Q
- What is the name of the special pigments that control a plants response to light?
A
Phytochromes
21
Q
- What is the region in a stem where a leaf is or was attached called?
A
Node
22
Q
- What happens if a plants guard cells malfunction?
A
The plant might suffer excess water loss
24
Q
- What is an opposite leaf arrangement?
A
Two leaves that are attached at the node
25
6. What is the name for root systems of grasses that consist of many roots that are nearly equal in size?
Fibrous root system
26
7. List three plant organs?
Stem
Root
Leaf
28
10. The name for reversible repeatable plant movements?
Nastic
29
11. The region to the outside of the xylem in a tree trunk?
Bark
30
14. What is an example of a chloroplast?
Plastid
32
15. Wood is a collection of?
Xylem
33
18. What is phototropism?
Growth response to light
34
19. What is gravitropism?
Growth response to gravity
36
22. List three things an annual growth rings composed of?
Spring wood
Xylem
Summerwood
36
23. Which is more flexible....woody stem or herbaceous stems?
Herbaceous stem
37
26. Does a plants stem exhibit negative gravitropism?
Yes
37
27. Is the closing of the Venus flytrap an example of thigmotropism?
No
38
30. What is the function of the cuticle on a leaf?
It protects the leaf
38
33.Where are stomata found?
On the lower surface of a leaf
38
36. Changes in turgor pressure causes what kind of movement?
Nastic
39
40. Explain the flow of water in a plant from start to finish?
Water enters a plant through the root hairs and then passes into the root. It travels through the root Cells until it reaches the vascular tissues in the middle of the root where it enters the xylem. The xylem then transports the water along the stems all the way to the leaves at the top of the plant. The water then leaves the plant through openings in the leaves called stomata.
40
41. How do cell walls and turgor pressure help support the weight of a plant?
Cell walls are the rigid outer boundaries of cells that contain cellulose which is a strong substance. There are millions of these microscopic cell walls throughout the plant to provide strong support. When there is enough water inside the cell walls the plant cells become swollen creating turgor pressure.when there is enough turgor pressure the plant becomes stiff which helps support the plant And keep it upright.
