f5 chap 7: adaptations of plants in different habitats

Question 1

what are classifications of plants based on habitats?

Answer 1

mesophytes, hydrophytes, halophytes,
and xerophytes

Question 2

whats halophytes?

Answer 2

plants that can live in a habitat with high
concentration of salt and low oxygen content.

Question 2

what kind of plant is mangrove tree?

Answer 2

halophytes

Question 3

example of halophytes?

Answer 3

mangrove tree

Question 4

whats hydrophytes?

Answer 4

to plants that can adapt to their wet habitat, whether by floating on the water surface or sinking in the water.

Question 5

example of hydrophytes plant?

Answer 5

lotus

Question 6

whats mesophytes?

Answer 6

plants that live in a habitat that is not too
dry nor too wet with an adequate supply of water.

Question 7

example of mesophytes?

Answer 7

mango tree

Question 8

are most plants halophytes, hydrophytes, mesophytes or xerophytes?

Answer 8

mesophytes

Question 9

whats xerophytes

Answer 9

habitat :hot, dry w minimum presence of water, high temp (dessert)

Question 10

example of xerophytes?

Answer 10

cactus

Question 11

where can halophytes be found?

Answer 11

swampy habitats, the meeting point of fresh water and seawater.

Question 12

where can hydrophytes be found

Answer 12

aquatic habitats, either on the water surface or submerged in the water.

Question 13

whats the adaptation of halophytes plants in terms of leaves?

Answer 13

• Leaves with thick cuticle and sunken stomata can reduce
  the rate of transpiration.
• Succulent leaves can store water.

Question 14

whats the adaptation of halophytes plants in terms of roots?

Answer 14

root system that branches widely provides support for plants to continue living in soft & muddy soils and also prevents plants plants from being uprooted due to strong wind

Question 15

whats pneumatophores?

Answer 15

hundreds of breathing roots thatgrow vertically upwards above the surface of the soil

Question 16

function of lenticels?

Answer 16

enable the exchange of gases with the atmosphere.

Question 17

what kind of roots do hydrophytes have?

Answer 17

fibrous roots

Question 18

why do hydrophytes plants have fibrous roots?

Answer 18

provide a large surface area and trap air bubbles
to enable the hydrophytes to be more stable and lighter

Question 19

characteristics of leaves of floating plants and its function?

Answer 19

broad, thin, flat to help these plants absorb maximum sunlight for photosynthesis

Question 20

why do plants that are submerged in water completely have thin and small leaves?

Answer 20

increase the total surface area per volume and to increase the
diffusion rate of water, mineral salts and dissolved
gases directly into the plants through the
epidermis.

Question 21

why are the stems of a plant thats submerged in water completely small and hollow?

Answer 21

help these plants float upright in the water and help to
reduce water flow resistance.

Question 22

whats the adaptative ability of xerophytes that help overcome problem of extreme dryness

Answer 22

roots of xerophytes grow widely and can penetrate deep into the
soil to absorb water and mineral salts. water absorbed is stored in roots, stems, leaves

Question 23

what are the plants in arctic classified as?

Answer 23

xerophytes

Question 24

how does the adaptive features of cactus plant?

Answer 24

cactus has small leaves and thick waxy cuticles on its stem and leaves. there are also leaves modified into thorns (reduces total surface area exposed to sun thus reducing water loss)

Question 25

how do presence of thorns help cactus ?

Answer 25

i) get water supply by collecting dew
ii) prevent plant from getting eaten by animals

Question 26

why is the stomata in cactus embedded?

Answer 26

reduce water evaporation from leaves