Filters

CBSE

Ecology

Ecology - Biology Questions asked by Filo students

Views: 5,254

What will be the effect of green-house on the stomatal density in a particular species over the time?

The stomatal density decreases
The stomatal density increases
There is no change in stomatal density
The stomatal density first increases and then decreases

Topic:

Ecology

View solution

Views: 5,267

Halophytes such as mangrooves meet high osmotic pressures in the soil. They overcome the problem of water uptake by

(2^{nd}

)

increase in the root to shoot ratio
reduction in the number of stomata to reduce transpiration
accumulation of electrolytes in the vacuoles
growth at relatively high humidities to reduce

Topic:

Ecology

View solution

Views: 5,238

Halophytes such as mangrooves meet high osmotic pressures in the soil. They overcome the problem of water uptake by

(2^{nd}

)

increase in the root to shoot ratio
reduction in the number of stomata to reduce transpiration
accumulation of electrolytes in the vacuoles
growth at relatively high humidities to reduce transpiration

Topic:

Ecology

View solution

Views: 5,330

Which of the following represents the sedimentary type of nutrient cycle?

Nitrogen cycle
Carbon cycle
Phosphorus cycle.
Oxygen cycle

Topic:

Ecology

View 2 solutions

Views: 5,774

When a new male, takes over a lion pride, they sometimes kill or evict the cubs already present. This phenomena can be explained from behavioural ecology

the male doesn't like cubs
the male cannot afford too much for caring for those cubs
the male breed his own offspring
degeneration of the males parental behaviour

Topic:

Ecology

View solution

Views: 5,237

A :

A + B

A + B + C :

Surviva Compare the two graphs (Assume that both the graphs have identical

X

Y

axes). graphs have identical

X

Y

ax Mark the correct interpretation.

{"(4) Species shown in graph II is more evolved and more specialized in function than that shown in graph I","(b) Species shown in graph II has higher survivorship but less reproductive success","(c) Both species have identical feeding niche","(d) If both the species coexist, there are greater chances of graph I being eliminated due to severe competition"}

Topic:

Ecology

View solution

Views: 5,489

X

Y

5 m \times 5 m

? 22. The Baltic Sea is brackish, receiving salt water from the North Sea, and fresh water from rivers. Turnover of water in deep layers is much slower that at surface layers.

Topic:

Ecology

View solution

Views: 6,057

5 m \times 5 m

? 22. The Baltic Sea is brackish, receiving salt water from the North Sea, and fresh water from rivers. Turnover of water in deep layers is much slower that at surface layers.

Topic:

Ecology

View solution

Views: 6,019

The shell of the land snail shows variation in both colour and banding pattern. In order to construct a 5 -figure banding formula, bands are numbered a 5 -figure banding formula, bands are construct from the top of the largest whorl, as shown in the diagram. ' 0 ' is used to represent the absence of a band and square brackets indicate the fusion of two bands.

26.

(Banding formula

= 12345

Topic:

Ecology

View solution

Question 10

Views: 6,037

mode that will be favoured. 34. Members of a macroscopic food chain of a marine ecosystem are enlisted below. Numbers in front of them indicate the carbon assimilated in

g / m^{2} /

Filter feeders
Surf zooplankton
Surf diatoms
Fishes
Benthic carnivores
Piscivorous fishes

Topic:

Ecology

View solution

Found the solution, but did not understand the concept?

Connect with a tutor in less than 60 seconds 24x7

Ask my first question

Question 11

Views: 5,632

Indian National Biology Olympiad 37. Below are listed some anatomical/physiological adaptations of brown alga Fucus vasiculosus, Match each one with one survival advantage by writing the correct alphabet

(a - g)

in the table in the answer sheet. Choose from the options given below. Options:

Optimum absorption of red light
Strength against pounding waves and stones
Protection against desiccation at low tides
Prevention of water loss by osmosis
Optimum buoyancy at high tides
Effective movement of motile gametes

Topic:

Ecology

View solution

Question 12

Views: 6,035

Below are listed some anatomical/physiological adaptations of brown alga Fucus rasiculosus, Match each one with one survival advantage by writing the correct alphabet

(a - g)

in the table in the answer sheet. Choose from the options given below. Options :

Optimum absorption of red light
Strength against pounding waves and stones
Protection against desiccation at low tides
Prevention of water loss by osmosis
Optimum buoyancy at high tides
Effective movement of motile gametes

Topic:

Ecology

View solution

Question 13

Views: 6,071

Below are listed some anatomical/physiological adaptations of brown alga Fucus rasiculosus, Match each one with one survival advantage by writing the correct alphabet

(a - g)

in the table in the answer sheet. Choose from the options given below. Options :

Optimum absorption of red light
Strength against pounding waves and stones
Protection against desiccation at low tides
Prevention of water loss by osmosis
Optimum buoyancy at high tides
Effective movement of motile gametes

Topic:

Ecology

View solution

Question 14

Views: 5,247

Ques - 1 "Read the lines given below and fill in the blank(s) with the suitable option to create a coherent paragraph. Instead of focusing on who is and yammering about me, I focus on channelling my anger into productive actions. I believe one should refrain fron indulging in any _. It's all about working constructively." उत्तर / Answers:

drivelling, flim-flam
0 chatting, fiddle-faddle
jabbering, shabbiness
0 conferring, stinginess

Topic:

Ecology

View solution

Question 15

Views: 5,638

An insecticide is sprayed on the vegetation in an area. In 143 which organisms will be (righest level of insecticide accumulate after a period of time - (A) Foxes (B) Hawks .. (C) Mouse (D) Small bird

A only
A and D both
B only
A and B both

Topic:

Ecology

View solution

Question 16

Views: 5,626

What can be correct for follwing food web -

$F$ is secondary consumer
C is secondary consumer
Is scavenger
$J$ is decomposer

Topic:

Ecology

View solution

Question 17

Views: 5,931

How many molecules of

CO_{2}

are released two turns of Krebs cycle

2
6
4
3

Topic:

Ecology

View solution

Question 18

Views: 5,529

15.2.2 How do we conserve Biodiversity? When we conserve and protect the whole ecosystem, its biodiversity at all levels is protected - we save the entire forest to save the tiger. This approach is called in situ (on site) conservation. However, when there are situations where an animal or plant is endangered or threatened (organisms facing a very high risk of extinction in the wild in the near future) and needs urgent measures to save it from extinction, ex situ (off site) conservation is the desirable approach. In situ conservation-Faced with the conflict between development and conservation, many nations find it unrealistic and economically not feasible to conserve all their biological wealth. Invariably, the number of species waiting to be saved from extinction far exceeds the conservation resources available. On a global basis, this problem has been addressed by eminent conservationists. They identified for maximum protection certain 'biodiversity hotspots' regions with very high levels of species richness and high degree of endemism (that is, species confined to that region and not found anywhere else). Initially 25 biodiversity hotspots were identified but subsequently nine more have been added to the list, bringing the total number of biodiversity hotspots in the world to 34 . These hotspots are also regions of accelerated habitat loss. Three of these hotspots - Western Ghats and Sri Lanka, Indo-Burma and Himalaya - cover our country's exceptionally high biodiversity regions. Although all the biodiversity hotspots put together cover less than 2 per cent of the earth's land area, the number of species they collectively

Topic:

Ecology

View 9 solutions

Question 19

Views: 5,513

A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them. Interpretations:

"B" is earlier pyramid and shows stabilized growth rate.
"B" is more recent showing that population is very young.
"A" is the earlier pyramid and no change has occurred in the growth rate.
" $A$ " is more recent and shows slight reduction in the growth rate.

Topic:

Ecology

View 15 solutions

Question 20

Views: 5,106

Bookmarks A country with a high A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them. Age

70 +

Interpretations: (a) "B" is earlier

"B" is earlier pyramid and shows stabilized growth rate.
" $B$ " is more recent showing that population is very young.
" $A$ " is the earlier pyramid and no change has occurred in the growth rate.
" $A$ " is more recent and shows slight reduction in

Topic:

Ecology

View solution

Prev

1 2 3 4 5 6 7

Next

Get instant study help from an expert tutor 24/7