Identify the animal with following characteristics:
1. They are very simple.
2. They have porous body.
3. Water flows in and out of the pores.
4. Oxygen and nutrients are absorbed directly through water.

Echinoderms

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Insects

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Worms

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Sponges

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Solution

The correct option is D Sponges
These are the characteristics of a sponge. Sponges have very simple body and cells are loosely arranged. As the body is porous, water moves in and out freely. Oxygen and nutrients are absorbed through water directly.

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Question 2

Following are some features of plants.
(1) They lose a lot of water through transpiration.
(2) Their leaves are always broad and flat.
(3) They lose very little water through transpiration.
(4) Their roots grow very deep into the soil.

Which of the combination of above features are typical of desert plants?
(a) (1) and (2)
(b) (2) and (4)
(c) (2) and (3)
(d) (3) and (4)

Q. These animals are with simplest body plan and are called as 'Sponges'. They bear numerous pores on their body. Those pores are called ...........

Q. Consider the following four statements (i)-(iv) about certain desert animals such as kangaroorat
(i) They have dark colour and high rate of reproduction and excrete solid urine
(ii) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
(iii) They feed on dry seeds and do not required drinking water
(iv) They excrete very concentrated urine and do not use water to regulate body temperature.
Out of these four, which two are correct:

Q. Consider the following four statements (a-d) about certain desert animal. such as kangaroo rat.
(a) They have dark colour and high rate of reproduction and excrete solid urine.
(b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.
(c) They feed on dry seeds and do not require drinking water.
(d) They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true?

Q. Which of the following is/are not the characteristics of red soils?

1

. They are derived from weathering of old crystalline and metamorphic rocks.

2

. They contain iron oxides.

3

. They have high water retention capacity.

4

. They have high nitrogen content.

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Identify the animal with following characteristics: 1. They are very simple. 2. They have porous body. 3. Water flows in and out of the pores. 4. Oxygen and nutrients are absorbed directly through water.

The correct option is D SpongesThese are the characteristics of a sponge. Sponges have very simple body and cells are loosely arranged. As the body is porous, water moves in and out freely. Oxygen and nutrients are absorbed through water directly.

Identify the animal with following characteristics:
1. They are very simple.
2. They have porous body.
3. Water flows in and out of the pores.
4. Oxygen and nutrients are absorbed directly through water.

The correct option is D Sponges
These are the characteristics of a sponge. Sponges have very simple body and cells are loosely arranged. As the body is porous, water moves in and out freely. Oxygen and nutrients are absorbed through water directly.