Biology
Grade-8
Easy

Question

If the temperature of the Earth increases gradually and the surroundings become drier, which of the following plant would more likely survive?

  1. One that has stomata that open in the day
  2. One that has thick leaves and stems
  3. One that has thorns and spines
  4. Both b and c

hintHint:

Thick leaves and stems thornes and spines are adaptation to prevent from dehydration.

The correct answer is: Both b and c


    If the temperature of earth as an adaptive feature to survive in desert regions, the leaves of cactus are modified to thin, sharp structures called spines. The spines help in minimising the water loss through transpiration and protect the plant from grazing animals.The leaves and stems of many desert plants have a thick, waxy covering. This waxy substance does not cover the stomata, but it covers most of the leaves, keeping the plants cooler and reducing evaporative loss. Small leaves on desert plants also help reduce moisture loss during transpiration. Thorns represent the modification of an axillary shoot system in which the leaves are reduced and die quickly and the stems are heavily sclerified and grow for only a limited time (determinate growth). Thorns appear to protect the plant against herbivores.

    Related Questions to study

    Grade-8
    Biology

    Succulents grow in which region?

    Succulents grow in which region?

    BiologyGrade-8
    Grade-8
    Biology

    The arctic environment has lower temperatures ranging between −22°C and 6°C, with snow covering the majority of the area. Which adaptation would be favourable for the survival of a population of organisms in this environment:

    The arctic environment has lower temperatures ranging between −22°C and 6°C, with snow covering the majority of the area. Which adaptation would be favourable for the survival of a population of organisms in this environment:

    BiologyGrade-8
    Grade-8
    Biology

    What is INCORRECT about hibernation.

    What is INCORRECT about hibernation.

    BiologyGrade-8
    parallel
    Grade-8
    Biology

    An adaptation where animals move to a different habitat in search of food, water and shelter is known as:

    An adaptation where animals move to a different habitat in search of food, water and shelter is known as:

    BiologyGrade-8
    Grade-8
    Biology

    The flexible jaw of a snake is a

    The flexible jaw of a snake is a

    BiologyGrade-8
    Grade-8
    Biology

    During hibernation, animals show which of the following changes?

    During hibernation, animals show which of the following changes?

    BiologyGrade-8
    parallel
    Grade-8
    Biology

    ______________ allows an organism to survive better in its environment

    • Such changes occur in the organisms that helps them to survive better in the environment. This is called adaptation.
    • These changes occur at genetic level and pass on to the next generation.
    • These adaptations can be structural, behavioral or physiological. 
    • For example, most of the animals found in desert have a thick dermis layer on their body that assure minimum water loss. 

    ______________ allows an organism to survive better in its environment

    BiologyGrade-8

    • Such changes occur in the organisms that helps them to survive better in the environment. This is called adaptation.
    • These changes occur at genetic level and pass on to the next generation.
    • These adaptations can be structural, behavioral or physiological. 
    • For example, most of the animals found in desert have a thick dermis layer on their body that assure minimum water loss. 

    Grade-8
    Biology

    Animals migrate because of:

    • Animals migrate according to the season.
    • The conditions of the place in a season becomes unfavorable.
    • The animals can't survive or breed in such conditions, so they move to the other place. The distance of the travel can be around 25 miles.
    • They migrate because of high or very low temperature conditions or unavailability of food. 
    • Bar headed geese migrate from Himalaya to south Asia in winter season.
    • They travel 1000 miles. 
    • The condition of this place when becomes unfavorable they again move to the Himalayas.

    Animals migrate because of:

    BiologyGrade-8

    • Animals migrate according to the season.
    • The conditions of the place in a season becomes unfavorable.
    • The animals can't survive or breed in such conditions, so they move to the other place. The distance of the travel can be around 25 miles.
    • They migrate because of high or very low temperature conditions or unavailability of food. 
    • Bar headed geese migrate from Himalaya to south Asia in winter season.
    • They travel 1000 miles. 
    • The condition of this place when becomes unfavorable they again move to the Himalayas.

    Grade-8
    Biology

    The phenomenon in which animals go into a deep sleep is known as

    • Hibernation and aestivation are also types of behavioural adaptation.
    • During winters animals show hibernation.
    • They avoid normal activities like hunting or roaming.
    • Also they slower their metabolic rate, heart rate and breathing rate.
    • So that they can save their energy.
    • Most of the bears and snakes go into a deep sleep. 

    The phenomenon in which animals go into a deep sleep is known as

    BiologyGrade-8

    • Hibernation and aestivation are also types of behavioural adaptation.
    • During winters animals show hibernation.
    • They avoid normal activities like hunting or roaming.
    • Also they slower their metabolic rate, heart rate and breathing rate.
    • So that they can save their energy.
    • Most of the bears and snakes go into a deep sleep. 

    parallel
    Grade-8
    Biology

    Camels can drink up to how many liters of water in one go?

    • Camel is found in the desert.
    • The temperature is around 50 C during summer.
    • There is a lesser availability of food and water. The environment is also dry.
    • So the camel has to survive in such conditions and it shows many adaptations like it can live without drinking water for 7 days.
    • It can live for a maximum of 15 days without drinking water.
    • It can drink around 100 to 200 water once. 
    • The water is stored in its blood.
    • Also in the hot temperature, it is required to resist water loss.
    • So, they do not sweat much and due to low metabolism, their body temperature is lesser.

    Camels can drink up to how many liters of water in one go?

    BiologyGrade-8

    • Camel is found in the desert.
    • The temperature is around 50 C during summer.
    • There is a lesser availability of food and water. The environment is also dry.
    • So the camel has to survive in such conditions and it shows many adaptations like it can live without drinking water for 7 days.
    • It can live for a maximum of 15 days without drinking water.
    • It can drink around 100 to 200 water once. 
    • The water is stored in its blood.
    • Also in the hot temperature, it is required to resist water loss.
    • So, they do not sweat much and due to low metabolism, their body temperature is lesser.

    Grade-8
    Biology

    Arctic foxes living in polar regions show which adaptation?

    • The Arctic fox is found on ice packs
    • They show many adaptations to survive in the cold environment.
    • They have grey or brown fur.
    • They can change the colour of fur according to the season.
    • During winter their coat colour is white.
    • When summer starts the white fur sheds and a thin grey coat covers its body.
    • Later the grey fur becomes brown.
    • So, this is how the arctic fox show camouflage.
    • This helps in blending with the colour of the environment so that it can hide from the prey and can easily hunt. 

    Arctic foxes living in polar regions show which adaptation?

    BiologyGrade-8

    • The Arctic fox is found on ice packs
    • They show many adaptations to survive in the cold environment.
    • They have grey or brown fur.
    • They can change the colour of fur according to the season.
    • During winter their coat colour is white.
    • When summer starts the white fur sheds and a thin grey coat covers its body.
    • Later the grey fur becomes brown.
    • So, this is how the arctic fox show camouflage.
    • This helps in blending with the colour of the environment so that it can hide from the prey and can easily hunt. 

    Grade-8
    Biology

    Populations do not change if their environment changes.

    Populations do not change if their environment changes.

    BiologyGrade-8
    parallel
    Grade-8
    Biology

    BiologyGrade-8
    Grade-8
    Biology

    BiologyGrade-8
    Grade-8
    Biology

    Charles Darwin was a __________ naturalist.

    Charles Darwin was a __________ naturalist.

    BiologyGrade-8
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.