In the absence of which of the following factors does photosynthesis not take place in leaves?
(A) Guard cells.
(B) Chlorophyll.
(C) Vacuoles.
(D) The space between the cells.
Years. :
b. Chlorophyll.
Explanation:
Chlorophyll is the green pigment in the leaves of plants that absorbs the energy of sunlight to carry out photosynthesis. Without chlorophyll, the leaves would not be able to absorb the energy of sunlight. Therefore, photosynthesis cannot take place.
How does carbon dioxide affect photosynthesis?
(A) Poor availability of carbon dioxide lowers the rate of photosynthesis
(B) A higher availability of carbon dioxide lowers the rate of photosynthesis
(C) Poor availability of carbon dioxide increases the rate of photosynthesis
(D) None of these possibilities
Years. :
a. Poor availability of carbon dioxide decreases the rate of photosynthesis
The green colour of the plant is due to the presence of:
(A) Oxygen.
(B) Carbon dioxide.
(C) Nitrogen.
(D) Chlorophyll.
Years. :
d. Chlorophyll.
Which of the following substances is obtained from plants?
(A) cheese
(B) pulses
(C) Quark
(D) None of these products
Years. :
b. Legumes
The process by which a plant produces its food, "photosynthesis", takes place in the presence of:
(A) Moonlight.
(B) Sunlight.
(C) Candlelight.
(D) Light bulb.
Years. :
b. Sunlight.
Which of the following organisms feeds on dead and decaying matter?
(A) Algae.
(B) Fungi.
(C) Amoeba.
(D) Insectivorous plants.
Years. :
b. Fungi.
Which structure in a green plant controls the opening and closing of the stomata?
(A) Sentinel cell
(B) Mesophyll
(C) phloem
(D) xylem
Years. :
a. Guard cell
Explanation:
Each stoma is surrounded by a pair of guard cells that control the opening and closing of the stomatal pore between them.
Choose the correct option from the following possibilities: Which part of the plant absorbs carbon dioxide from the air for photosynthesis?
(A) The root hairs.
(B) Stomata.
(C) Leaf veins.
(D) Flower petals.
Years. :
b. Stomata.
The process of food production in plants is called:
(A) glycolysis
(B) photosynthesis
(C) photolysis
(D) chemosynthesis
Years. :
b. photosynthesis
Which of the following statements is or are correct?
(A) Insectivorous plants do not photosynthesize at all and obtain their nutrients from insects.
(B) Parasitic nutrition is a form of “heterotrophic nutrition".
(C) The association of legume plants with Rhizobium bacteria is an example of a saprotrophic relationship.
(D) None of the above
Years. :
b. The rasitic diet is a form of “heterotrophic diet".
Explanation:
The type of diet in which organisms depend on others for their food is called a heterotrophic diet. An organism that takes its food or nutrients from others without giving anything in return is called a “parasitic diet”. And the body in which it lives is called the “host”. It takes nutrients from the host's body and the parasite gradually damages it, possibly causing death.
Some organisms live together and share protection and nutrients. This is called .
(A) Predation.
(B) Symbiotic relationship.
(C) Autotrophs.
(D) Heterotrophs.
Years. :
b. Symbiotic relationship.
The term used for the nutritional mode of yeast, fungi and bread mould is: Autotrophic Insectivorous Saprophytic Parasitic.
(A) Autotrophic.
(B) Insectivorous.
(C) Saprophytic.
(D) Parasitic.
Years. :
c. Saprophytic.
Explanation:
Saprophytic nutrition occurs in yeast, fungi and bread moulds. In this type of nutrition, the organisms obtain their food from dead and decaying organic matter. Such organisms are referred to as saprophytes.
A parasitic plant with a yellow, slender and tubular stem is:
(A) Pitcher plant
(B) Cuscuta
(C) sunflower
(D) None of these species
Years. :
a. Pitcher plant
Explanation:
Cuscuta is a parasitic plant with a yellow, slender and tubular stem.
In which of the following ways does the food help living organisms?
(A) Helps with growth
(B) By providing energy
(C) Helps with reproduction
(D) All of these ways
Years. :
d. All of these
It is not advisable to sit under trees at night because:
(A) carbon dioxide emissions are higher under the trees at night
(B) Trees sleep at night
(C) Plants produce food during the night
(D) None of these possibilities
Years. :
a. The carbon dioxide content is higher at night under the trees
Explanation:
It is not advisable to sit under the trees at night because the carbon dioxide content under the trees is higher at night.
The plants are photosynthesizing:
(A) They take up O 2 and release CO 2
(B) They absorb CO 2 and release O 2
(C) They absorb O 2 and release it
(D) They absorb O 2 and release water.
Years. :
b. Absorbing CO 2 and releasing O 2
The green plant or animal that provides the food is called:
(A) Insect
(B) Host
(C) Parasite
(D) Picher plant
Years. :
b. Host
The stomata are present on:
(A) stems
(B) leaves
(C) flowers
(D) All of these
Years. :
a. Stem
Explanation:
The stomata are located on the leaves.
Organisms need food in order to:
(A) obtain energy
(B) fight diseases
(C) grow
(D) All of the above
Years. :
a. Production of energy
Explanation:
Organisms need food to obtain energy, fight diseases and grow.
If we look at the underside of a leaf through a magnifying lens, we can see numerous small openings. Which of the following terms stands for such openings?
(a) Stomata.
(b) Pattern.
(C) Midrib.
(D) Veins.
Years. :
a. Stomata.
Explanation:
Stomata are the numerous small openings on the underside of a leaf.
Each of these pores is surrounded by a pair of guard cells. The stomata help with gas exchange (CO 2 goes in and O 2 is let out).
Which of the following plants is an autotroph?
(A) Lichens
(B) Algae
(C) Fungus
(D) Cuscuta
Years. :
b. Algae
Explanation:
Like plants and some bacteria and fungi, algae are autotrophic. Autotrophic organisms are the producers in the food chain, i.e. they produce their own nutrients and energy. Kelp, like most autotrophs, produces energy through a process called photosynthesis.
Which part of the plant receives carbon dioxide from the air for photosynthesis?
(A) The root hairs.
(B) Stomata.
(C) Leaf veins.
(D) Sepals.
Years. :
b. Stomata.
Choose the correct option from the following: Which part of the plant absorbs carbon dioxide from the air for photosynthesis.
(A) The root hairs.
(B) Stomata.
(C) Leaf veins.
(D) Sepals.
Years. :
b. Stomata.
Green plants are known as:
(A) Heterotrophs
(B) Autotrophs
(C) Saprotrophs
(D) None of these species
Years. :
a. Heterotrophs
Explanation:
Green plants are known as autotrophs.
Which of the following is a parasite?
(A) Lichen
(B) Cuscuta
(C) pitcher plant
(D) Rhizobium
Years. :
b. Cuscuta
Explanation:
Nepenthes - It is an insectivorous plant.
Rhizobium - Rod-shaped, aerobic, nitrogen-fixing bacterium.
Cuscuta - Complete stem parasite.
Lichen - A special type of plant formed by the combination of algae and fungi.
The associations of organisms in which they live together and share shelter and nutrients are known as ___________.
(A) Saprophyte.
(B) Autotroph.
(C) Symbiosis.
(D) Parasite.
Years. :
c. Symbiosis.
Choose the correct order of terms that describes the process of nutrition in ruminants.
(A) Swallowing →partial digestion → rumination → complete digestion.
(B) Rumination → swallowing → partial digestion → complete digestion.
(C) Rumination → swallowing → mixing with digestive juices → digestion.
(D) Swallowing → chewing and mixing → partial digestion → complete digestion.
Years. :
a. Swallowing → partial digestion → rumination → complete digestion.
Explanation:
The feeding process in ruminants is as follows: swallowing → partial digestion (rumination) → rumination in the mouth → chewing of the cud → other departments of the stomach → small intestine → complete digestion.
Which of the following statements about "Mosquito" is false?
(A) It can be considered an anomnivore.
(B) The adult female feeds on blood to provide the proteins of the eggs.
(C) The larva of the mosquito feeds on microorganisms.
(D) None of the above possibilities
Years. :
d. None of the above possibilities
Explanation:
All mosquitoes breed in water. A mosquito goes through different types of feeding during its life cycle. The larva feeds on microorganisms. The adult female feeds on blood to provide protein for the eggs and the adults of both species feed on plant nectar. Therefore, it is best to consider them omnivorous.
Which of the following foods do not come from plants?
(A) Rice
(B) Wheat
(C) cheese
(D) fruit
Years. :
c. Cheese
In the absence of which of the following elements does photosynthesis not take place in leaves?
(A) guard cells
(B) Chlorophyll
(C) vacuoles
(D) Space between the cells
Years. :
b. Chlorophyll
Chlorophyll and some other raw materials are needed for photosynthesis such as:
(A) H2O.
(B) Solar energy.
(C) CO2.
(D) All of the above.
Years. :
d. All of the above.
Explanation:
Photosynthesis is a process in which green plants produce their own food from CO2 and H2O by utilising solar energy in the presence of chlorophyll. Oxygen is released during this process.
The internal factor that influences the process of photosynthesis is:
(A) temperature
(B) Chlorophyll
(C) Light
(D) water
Years. :
a. Temperature
What does auto mean for autotrophs?
(A) Other
(B) Self
(C) Light
(D) food
Years. :
b. Self
What is released when smaller molecules react with oxygen in the cell?
(A) Hydrogen
(B) Light
(C) Energy
(D) Methane
Years. :
c. Energy
In the absence of which of the following elements does photosynthesis not take place in leaves?
(A) Guard cells.
(B) Chlorophyll.
(C) Vacuoles.
(D) Space between the cells.
Years. :
b. Chlorophyll.
Explanation:
Chlorophyll makes plants green. Chlorophyll is found in the chloroplasts of a plant, which are tiny structures in the plant cells. It is basically a group of green pigments that are used by organisms to convert sunlight into energy.
The components of food necessary for our body are:
(A) carbohydrates
(B) proteins
(C) Vitamins
(D) All these components
Years. :
a. Carbohydrates
Explanation:
The food components necessary for our body are carbohydrates, proteinsand vitamins.
The plant that catches insects and feeds on them is:
(A) Cuscuta.
(B) Chinarose.
(C) Pitcher plant.
(D) Rose.
Years. :
c. Pitcher plant.
When we look at the underside of a leaf through a magnifying lens, we see numerous small openings. Which of the following terms describes these openings?
(a) Stomata.
(b) Patterning.
(C) Midrib.
(D) Veins.
Years. :
a. Stomata.
Iodine is used to detect the presence of starch. It yields starch:
(A) Red colour.
(B) Green colour.
(C) Blue-black colour.
(D) Colourless appearance.
Years. :
c. Blue-black colour.
The cell is enclosed by a thin outer border which can be?
(A) Cell membrane.
(B) Chromatin.
(C) Cytoplasm.
(D) Nuclear membrane.
Years. :
a. Cell membrane.
Explanation:
The bodies of living organisms consist of tiny units called “cells”. Cells can only be seen under a microscope. Some organisms consist of only one cell. The cell is surrounded by a thin outer boundary called the “cell membrane”.
___________ Gas is released by plants in the process of photosynthesis.
(A) Oxygen.
(B) Carbon dioxide.
(C) Nitrogen.
(D) Hydrogen.
Years. :
a. Oxygen.
Which of the following energy conversions take place in the process of photosynthesis?
(A) Solar energy is converted into chemical energy.
(B) Solar energy is converted into mechanical energy.
(C) Bioenergy is converted into chemical energy.
(D) Chemical energy is converted into light energy.
Years. :
a. Solar energy is converted into chemical energy.
Two different organisms that live together and benefit from each other are called:
(a) Parasitic
(B) Saprophytic
(C) Heterotrophic
(D) Symbiotic
Years. :
b. Saprophytic
Explanation:
When two different organisms live together and both benefit from each other, this is called a symbiosis.
Select the incorrect statements. What happened if the wheat dough was left outside for a few days?
(A) It starts to give off a foul odour.
(B) It starts to grow saprophytic fungi and yeasts.
(C) The carbohydrates in wheat break down into carbon dioxide.
(D) It is the place where Rhizobium bacteria grow.
Years. :
d. It is the place where the rhizobium bacteria grow.
Explanation:
Carbohydrates in wheat to promote the growth of yeast and other saprophytic fungi. They break down carbohydrates into simpler compounds such as carbon dioxide and alcohol, resulting in a foul odour.
The chemical used in the starch test is:
(A) Safranin
(B) Blue ink
(C) Iodine
(D) Litmus
Years. :
has. Safranin
Explanation:
Iodine is the chemical used in the starch test.
Two organisms are good friends and live together. One provides shelter, water and nutrients, while the other prepares and provides food. Such an association of organisms is referred to as: Saprophyte Parasite AutotrophySymbiosis:
(A) Saprophyte
(B) Parasite
(C) Autotroph
(D) Symbiosis
Years. :
d. Symbiosis
The product of photosynthesis is:
(A) carbohydrate.
(B) Protein.
(C) Fats.
(D) All of these products.
Years. :
d. All of these.
Which of the following is not an end product of photosynthesis ?
(A) carbon dioxide
(B) oxygen
(C) Water vapour
(D) Glucose
Years. :
a. Carbon dioxide
Explanation:
Carbon dioxide is not an end product of photosynthesis.
Which of the following nutrients is a component of food?
(A) water
(B) protein
(C) Vitamin
(D) All of these
Years. :
d. All of these
The components that are necessary for our body are called.
(A) Vitamins.
(B) Legumes.
(C) Nutrients.
(D) Minerals.
Years. :
c. Nutrients.
Which of the following elements shows a symbiotic relationship?
(A) Both (a) and (b)
(B) Rhizobium bacteria and leguminous plants
(C) Lichens
(D) None of these elements
Years. :
c. Lichens
Explanation:
Lichens, Rhizobium bacteria and legumes have a symbiotic relationship.
What is insectivorous nutrition?
(A) The type of diet in which green plants produce their own food but rely on insects for nitrogenous food
(B) The type of diet in which green plants do not produce their own food but rely on insects to feed them
(C) The two plants live together as part of the same plant and helping each other out
(D) None of the above
Years. :
a. The type of nutrition in which green plants produce their own food but rely on insects for nitrogenous food
The organisms that provide nutrients to the parasitic organisms are called:
(A) Hosts
(B) parasite
(C) autotrophic
(D) heterotrophs
Years. :
a. Hosts
Explanation:
Parasitic nutrition or parasitism is a form of heterotrophic nutrition in which an organism (the so-called parasite) lives on the body surface or in the body of another living organism (the so-called host).
The parasite obtains its food directly from the host's body.
The internal factor that influences the process of photosynthesis is ___________.
(A) Temperature.
(B) Chlorophyll.
(C) Light.
(D) None of these factors.
Years. :
b. Chlorophyll.
Two organisms are good friends and live together. One provide? Shelter, water and nutrients, while the other prepares and supplies food. Such a combination of organisms is called:
(A) Saprophyte.
(B) Parasite.
(C) Autotroph.
(D) Symbiosis.
Years. :
d. Symbiosis.
Which part of the plant captures the sun's energy?
(A) Root
(B) Leaves
(C) Stem
(D) Flower
Years. :
c. Stem
Explanation:
Solar energy is captured by the leaves of the plant.
Name the two types of parasitic plants:
(A) Cuscuta, mistletoe
(B) Partial, Complete
(C) Fungus, lichen
(D) Fungus, alga
Years. :
b. Partial, Complete
The type of nutrition in which organisms produce their own food from simple substances is called.
(A) Autotrophic nutrition.
(B) Heterotrophic nutrition
(C) Saprotrophic nutrition.
(D) All of the above terms.
Years. :
a. Autotrophic nutrition.
What is the ultimate source of energy for all living organisms?
(A) Water energy
(B) Wind energy
(C) Solar energy
(D) Chemical energy
Years. :
c. Solar energy
Explanation:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy.
It takes place in two steps, the light reaction and the dark reaction.
In the light reaction, ATP and NADPH 2 are synthesized, which are used in the dark reaction to convert carbon dioxide into carbohydrates.
The sun is therefore described as the ultimate source of energy for all living organisms.
The tiny pores in the leaves of plants, which are used for gas exchange, are called __________.
(a) Stomata.
(B) Tracheae.
(C) Chloroplasts.
(D) Spiracles.
Years. :
a. Stomata.
Organisms need food to:
(A) obtain energy
(B) fight diseases
(C) grow
(D) All of the above
Years. :
a. Extraction of energy
Water moves from the roots to the leaves through:
(A) stomata
(B) phloem
(C) xylem
(D) None of these possibilities
Years:
am. Stomata
Explanation:
Water passes from the root to the leaves via the xylem.
We all have to carry out different activities:
(A) fruit
(B) water
(C) energy
(D) sunlight
Years. :
c. Energy
Which of the following species are autotrophic?
(A) All plants.
(B) Green plants.
(C) All animals.
(D) Unicellular organisms.
Years. :
b. Green plants.
Which part of the plant is called a food factory?
(A) Fruits
(B) seeds
(C) leaves
(D) flowers
Years. :
c. Leaves
Which of the following is the largest flower in the world?
(A) Rafflesia
(B) Iris
(C) Narcissus
(D) Orchid
Years. :
a. Rafflesia
The pitcher plant catches insects because it:
(A) is a heterotroph
(B) grows in soils that lack nitrogen
(C) has no chlorophyll
(D) has a digestive system like that of humans
Years. :
b. Grows in soils that lack nitrogen
Explanation:
Pitcher plants trap insects in its modified, trap-like organ to meet its needs for nitrogen and other nutrients when growing in nitrogen-deficient soils.
The dead insect in the trap provides the nutrients necessary for the normal functioning of the plant.
The main function of a leaf is:
(A) The preparation of food.
(B) To prevent disease.
(C) To support the plant.
(D) To give the plant an appropriate shape.
Years. :
a. To prepare food.
If we look at the underside of a leaf through a magnifying lens, we can see numerous small openings. Which of the following terms stands for such openings?
(a) Stomata.
(b) Pattern.
(C) Midrib.
(D) Veins.
Years. :
a. Stomata.
Explanation:
Stomata are the numerous small openings on the underside of a leaf. Each of these pores is surrounded by a pair of guard cells. The stomata help with gas exchange (CO2 goes in and O2 is let out).
The chlorophyll is located inside the:
(A) stroma
(B) thylakoids
(C) hypodermis
(D) awn
Years. :
b. Thylakoids
The pitcher plant falls into the category of:
(A) herbivores
(B) Insectivores
(C) Carnivores
(D) None of these categories
Years. :
has. Herbivore
Explanation:
The pitcher plant falls into the category of insectivores.
Which part of the plant is known as its food factory?
(A) Fruits
(B) seeds
(C) leaves
(D) flowers
Years. :
c. Leaves
Explanation:
Leaves are the specialised structures for food production and are therefore called the food factories of plants.
The plant that catches insects and feeds on them is:
(A) Cascutta.
(B) China rose.
(C) Pitcher plant.
(D) Rose.
Years. :
c. Pitcher plant.
During photosynthesis:
(A) solar energy is converted into chemical energy
(B) solar energy is converted into mechanical energy
(C) chemical energy is converted into mechanical energy
(D) Bioenergy is converted into chemical energy
Years. :
a. Solar energy is converted into chemical energy
Explanation:
Plants use the process of photosynthesis, which converts light energy (solar energy) into chemical energy. With the help of photosynthesis, plants can produce their own food from carbon dioxide and water if sunlight and chlorophyll are available.
During this process, oxygen is released and glucose is produced. The glucose is either stored or converted into starch or used for respiration.
Photosynthesis is not possible in the absence of ___________.
(A) Guard cells.
(B) Chlorophyll.
(C) Vacuoles.
(D) Space between the cells.
Years. :
b. Chlorophyll.
Choose the correct option from the following: Plants absorb carbon dioxide from the atmosphere mainly through their:
(A) roots.
(B) Stem.
(C) flowers.
(D) Leaves.
Years. :
d. Leaves.
The green pigments in the leaves are called
(A) haemoglobin
(B) lobulin
(C) albumin
(D) chlorophyll
Years.
