Science 1 Marks Question

Pitcher plant

Leaves contain chlorophyll that traps solar energy and takes in carbon dioxide from the air through stomata, for photosynthesis.

The mode of nutrition in plant is autotrophic, i.e. they synthesise their own food.

All organisms take food and utilize it to get energy for the growth and maintenance of their bodies.

Green plants are called autotrophy since they synthesis their own food.

Plants absorb mineral nutrients from soil. Thus, declining their concentration in soil fertilisers and manures enhance or add these essential nutrients back in soil.

Stomata.

Animals and human beings.

In desert plants to minimize water loss, leaves are reduced to spines. Most of the photosynthesis is carried by the green stem.

Our body does not contain chlorophyll for absorbing solar energy which is necessary for preparing food using air, water, etc.

Organisms which can prepare their own food from raw materials (like mineral and water) are called autotrophs. e.g. green plants.

Symbiosis.
Symbiosis is an association between two different organisms that live together and help each other to survive, e.g. Licher (association between an alga and fungus).

Leaves are referred to as food factories of plants. This is because, leaves synthesise food by the process of photosynthesis.

Leaves contain chlorophyll which is essential for food preparation and is absent in other parts of plant.

Croton plant leaves are partly green and partly non-green and chlorophyll is present only in green portion of these leaves.

False.

Cactus, the part where photosynthesis occurs are stem and branches which are green.

Green plants prepare their own food with the help of carbondioxide, water in presence of sunlight and chlorophyll. So, they are called autotrophs.

Insectivorous plants grow in soil which lack nitrogen, therefore they eat insects to fulfill their need of nitrogen.

Living organisms need food to build their bodies, to grow, to repair damaged parts of their bodies and provide with energy to carry out life processes.

A cell contains nucleus, cytoplasm, vacuole, cell organelles like chloroplast, mitochondria, etc. No, animal cells are different from plant cells.

Carbohydrates are composed of carbon, hydrogen and oxygen.

Insectivorous plants.

This is because our body cells do not contain the necessary apparatus for photosynthesis.

The main components presents in carbohydrates are carbon, hydrogen and oxygen.

Pitcher plant.

1. Chlorophyll.
2. Sunlight.
3. Carbon Dioxide.
4. Water.

Some plants have green or white or other colour parts in the same leaf. Such leaves are called variegated leaves. Examples are: croton, money plant and coleus.

Fungus produces antibiotics like penicillin used to treat diseases and fungus can also harm us by causing fungal infections on skin and hair.

All green plants.

Boiling the leaf remove chlorophyll/ green colour from the leaves.

Lichens.

During photosynthesis plants take in carbon dioxide and release oxygen.

Mushroom.

Carbon dioxide from the air is taken in through tiny pores present on the leaves called stomate surrounded by guard cells. Guard cells control the opening and closing of stomate. Oxygen is released from the stomate as a waste product of photosynthesis.

False.

Chlorophyll.

Joseph Priestley.

The leaves other than green also have chlorophyll. The large amount of red, brown and other pigments mask the green colour. Photosynthesis takes place in these leaves also.

Plants that live in association with other plants and share shelter and food are called symbiotic plants. Lichens show symbiotic relationship i.e. association of green alga and fungi. Green alga prepare food by photosynthesis while the fungi provide mineral and water.

Fungi.

Rhizobium bacteria.

Starch.

Rhizobium is the bacterium which can fix atmospheric nitrogen.

Plants need nitrogen to synthesize proteins.

No it does not have chlorophyll. It is a parasitic plant which absorbs food from readymade plants.

Haustoria.

Pitcher plant does not get the sufficient nutrients from plants. Therefore, it fulfils its requirement by eating insects.

Cuscuta.