Thermoregulation

Q.

Give examples for eurythermal and stenothermal organisms.

Q. Organisms that can tolerate and thrive in a wide range of temperatures are called

1. Eukaryotic organisms
2. Stenothermal
3. Eurythermal
4. Thermoregulators

Q.

Statement 1: Small animals do not lose body heat very fast when it is cold outside.

Statement 2: Small animals have a smaller surface area relative to their volume

1. Statement 1 is correct and statement 2 is incorrect

2. Both statements 1 and 2 are incorrect

3. Both statements 1 and 2 are correct and statement 2 is not the explanation of statement 1.

4. Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

Q. Select the correct pair of adaptation in desert lizards.
(a) Burrowing in soil to escape high temperature
(b) Losing heat rapidly at high temperature
(c) Bask in the sun when temperature is low
(d) Insulating the body with thick fatty dermis

1. b and d
2. a and c
3. a and b
4. c and d

Q.

(a) Give an example of an endothermic animal.

(b) Give an example of an ectothermic animal.

(c) Give an example for an organism of the benthic zone.

Q. How do kangaroo rats and desert plants adapt themselves to survive in their extreme habitat? Explain. [3]

Q.

Give an example for:

(a) An endothermic animal

(b) An ectothermic animal

(c) An organism of benthic zone

Q.

Which of the following pairs belong to the category of cold blooded animals?

1. lizards and rats

2. snakes and birds

3. birds and monkeys

4. frogs and snakes

Q.

Classify Rohu, Scolidon, Flying lizard, King Cobra, Frog, Salamander, Ostrich, Pigeon, Bat, Crocodile and Whale into the cold-blooded/warm-blooded animals.

Q. When the temperature in the desert drops below the comfort zone, a desert lizard will __________________.

1. move into a shady place
2. generate body heat by metabolic reactions to keep the constant body temperature
3. use the fat under its skin to insulate itself
4. bask in the sun

Q. The animals that rely on the heat from the environment rather than metabolism to raise their body temperature are called ___

1. Ectothermic
2. Poikilothermic
3. Homeothermic
4. Endothermic

Q.

Consider the following four conditions (a - d) and select the correct pair of them as adaptation to environment in desert lizards.

The conditions are:

(p) Burrowing in soil to escape high temperature

(q) Losing heat rapidly from the body during high temperature

(r) Bask in sun when temperature is low

(s) Insulating body due to thick fatty dermis

1. (a), (c)

2. (b), (d)

3. (a), (b)

4. (c), (d)

Q.

Write a short note on

(a) Adaptations of desert plants and animals

(b) Adaptations of plants to water scarcity

(c) Behavioural adaptations in animals

(d) Importance of light to plants

(e) Effect of temperature or water scarcity and the adaptations of animals.

Q. Adaptation to low temperature and freezing in animals occurs due to the production of

1. Chaperonins
2. Proline
3. Antifreeze
4. Alanine

Q. Give an example for:
(a) An endothermic animal
(b) An ectothermic animal
(c) An organism of benthic zone

Q. What characterisitc best describes the organisms listed below?

Cat, toad, wall lizard, man, red algae

1. Eukaryotic organisms

2. Stenothermal

3. Eurythermal

4. None of these

Q. Select‌ ‌the‌ incorrectly‌ ‌matched‌ ‌pair(s):‌
‌

Column‌ ‌I‌ ‌	Column‌ ‌II‌ ‌
1. Term Ecology	Haeckel
2. Organisms that can tolerate and thrive wide range of temperatures	Stenothermal
3. Two biomes that are most similar with regard to rainfall	Tundra and desert

1. 1‌ only‌ ‌
2. 1‌ ‌and‌ ‌2‌ ‌only‌ ‌
3. 1‌ ‌and‌ ‌3‌ ‌only‌
4. 2‌ ‌only‌ ‌

Q.

Give an example for:

(a) An endothermic animal

(b) An ectothermic animal

(c) An organism of benthic zone

Q. Which of the following pairs belong to the category of cold blooded animals?

1. Frog and snakes
2. Snakes and birds
3. Bat and rats
4. Birds and monkey

Q. Assertion :Blood coagulates in the injured blood vessels. Reason: Uninjured blood vessels release an anticoagulant heparin.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals.

Q. When the environmental temperature is low, our peripheral blood vessels constrict, minimising blood flow near the skin.

1. True
2. False

Q. Is camel uricotelic ? Because only by this excretory mechanism it can prevent loss of water in a dry habitat.

Q. Which of the following(s) occur(s) during vasodilation?

1. Blood flow to the skin increases
2. Blood flow to the skin decreases
3. Heat is lost
4. Heat is retained

Q. Rainforests make up only 3 percent of the earth's surface. Over half the world's plant, animal, and insect species live there.
Combine the above sentence with a conjunction that expresses a contrast:

1. Rainforests make up only 3 percent of the earth's surface, so over half the world's plant, animal, and insect species live there.
2. Rainforests make up only 3 percent of the earth's surface, therefore over half the world's plant, animal, and insect species live there.
3. Rainforests make up only 3 percent of the earth's surface and over half the world's plant, animal, and insect species live there.
4. Although rainforests make up only 3 percent of the earth's surface, over half the world's plant, animal, and insect species live there.

Q. how does vasodilation and vasoconstriction regulate body temperature

Q.

among red , green and brown algae which is more likely to be found in deep sea?

Q. Which of the following is a group of warm-blooded animals?

1. Aves
2. Fishes
3. Amphibians
4. Reptiles

Q. Select the option which arranges the given organisms in ascending order of their life span.

1. $Parrot<Crow<Butterfly<Banyantree$
2. $Butterfly<Crow<Parrot<Crocodile$
3. $Fruitfly<Crocodile<Parrot<Banyantree$
4. $Parrot<Tortoise<Dog<Crow$

Q. Thermoregulation is an energitically expensive mechanism for many organisms.

1. False
2. True