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101.

A blood vessel which carries blood back to the heart is :A. arteryB. veinC. capillaryD. platelet

Answer» Correct Answer - B
102.

Fertilization in humans is internal.

Answer» Correct Answer - True
103.

The blood vessel which carries oxygenated blood from the lungs to the heart is :A. main arteryB. pulmonary arteryC. main veinD. pulmonary vein

Answer» Correct Answer - D
104.

In ___________ technique , fertilization is brought about in test tube .

Answer» In Vitro Fertilization
105.

Sister chromatids are pulled apart in metaphase.

Answer» Sister chromatids are pulled apart I anaphase.
106.

Coagulation of blood in a cut or wound is brought about by :A. plasmaB. plateletsC. WBCD. RBC

Answer» Correct Answer - B
107.

All chromosomes are arranged parallel to the equatorial plane of the cell in anaphase.

Answer» All chromosomes are arragned parallel to the equatorial plane of the cell in metaphase.
108.

What is gamete formation ?

Answer» Formation of sperm and ovum by meiosis is called as gamete formation.
109.

Plant cell divides by formation of a notch at the equatorial plane of the cell.

Answer» Plant cell divides by formation of a cell plate along the midline of the cell
110.

Process of gamete formation and spore formation occurs by ______.

Answer» Correct Answer - Meiosis
111.

Whether the gametes are diploid or haploid ? Why ?

Answer» The gametes are haploid as they have half the number of chromosomes (n).
112.

How are the haploid cells formed ?

Answer» Haploid cells are formed by a type of cell division called meiosis .
113.

__________ reproduces from the buds on the leaf margin .A. LotusB. HibiscusC. BryophyllumD. Papaya .

Answer» Correct Answer - C
Bryophyllum
114.

Hydra reproduces by __________A. binary fissionB. buddingC. fragmentationD. multiple fission.

Answer» Correct Answer - B
budding
115.

Asexual reproduction

Answer» Process of formation of new organism by an organism of same species without involvement of gametes is called asexual reproduction.
116.

It is an asexual or sexualn method of reproduction ? Why?

Answer» It is an asexual method of reproduction because only the root , stem and leaf are participating in the reproduction .
117.

______________ breaks open on arrival of favourable condition and many amoebulae are released .

Answer» Correct Answer - Cyst
118.

Body breaks up into several fragments and each fragment starts to live as a new individual . This is __________ type of reproduction.

Answer» fragmentation
119.

Advanced medical techniques for reproduction

Answer» IVF, Surrogacy , Sperm bank .
120.

Absence of genetic variation is an advantage of asexual reproduction .

Answer» False . Absence of genetic variation is a drawback of asexual reproduction .
121.

__________ is the stoppage of functioning of female reproduction system.

Answer» Correct Answer - Menopause
122.

An organ called as _________ is formed for the supply of food material to the embryo in the uterus .

Answer» Correct Answer - placenta
123.

Some persons experience difficulty in night vision since their childhood or adolescence.

Answer» (i) The difficulty in night vision is called night blindness.
(ii) This is due to the deficiency of vitamin A.
(iii) As a result , some persons experience difficulty is night vision.
124.

What would happen if Soil with seeds is submerged under water during germination.

Answer» If the soil is submerged under water during germination , seeds perform amaerobic respiration.
125.

Planaria : Regeneration :: Mucor : _________

Answer» Spore formation - Planaria reproduces by fragmentation , whereas Mucor reproduces by spore formation.
126.

Prokaryote: Bacteria:: Protist: ________

Answer» Amoeba-Prokaryotes like bacteria and Protists like Amoeba perform asexual reproduction by binary fisson.
127.

Root, stem, leaf: Vegetative propagation :: Flower :___________

Answer» Sexual reproduction - Root, stem and leaf reproduces by vegetative propagation of asexual reproduction , whereas flower reproduces by sexual reproduction. .
128.

Length of epididymis : 6 meters :: Length of a sperm : _____________

Answer» 60 micrometers - Length of each epididymis is about 6 meters, while the length of a sperm is about 60 micrometers.
129.

Papaya is a bisexual flower.

Answer» False . Papaya is an unisexual flower .
130.

Y-chromosomes is present in men and women.

Answer» False . Y-chromosome is present only in men .
131.

Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms ?

Answer» Aquatic organisms like fishes obtain oxygen from water present in dissolved state through their gills. Since the amount of dissolved oxygen is fairly low as compared to the amount of oxygen in the air, the rate of breathing in aquatic organisms is much faster than that seen in terrestrial organisms .
Terrestrial organisms use the oxygen present in the atmosphere in the atmosphere for respiration. This oxygen is absorbed by different organs in different animals.
132.

Nuclear division : karyokinesis : : Cytoplasmic division : _____________

Answer» Cytokinesis - Karyokinesis is the process of division of nucleus of a cell during phase of division,while cytokinesis is the process of division of cytoplasm of the cell.
133.

All plants give out oxygen during day carbon dioxide during night . Do you agree with this statement ? Give reason

Answer» Yes, the statement is correct .
Plants respire throughout the day, while photosynthesis takes place only in the presence of sunlight , In daytime, `CO_(2)` produced durng respiration is used by the plants in photosynthesis .So , `CO_(2)` is not released into the environment. The oxygen produced during photosynthesis , is released into air through stomata.
At night, when there is not photosynthesis , no oxygen is released . Also, `CO_(2)` produced during respiration is not uses by the plants . So, it is released in the air.
134.

In one of the following organisms, the gaseous exchange during repiration does not take place through cell membrane/skin. This organism is:A. Electric eelB. LeechC. EarthwormD. Amoeba

Answer» Correct Answer - A
135.

At the end of glycolysis , _______ molecule are obtained.

Answer» Pyruvic acid. A molecule of glucose is oxidized step by step in the process of glycolysis where two molecules of each, i.e. pyruvic acid, ATP, `NADH_(2)` and water are formed.
136.

Most abundant protein found in nature.

Answer» Correct Answer - RuBisCO
137.

Where are protein first digested in the alimentary canal ?A. small intestineB. oesophagusC. mouthD. stomach

Answer» Correct Answer - D
138.

Protein found in skin

Answer» Melanin, keratin
139.

The protein ossein is produced in .......................A. bloodB. musclesC. boneD. pancreas

Answer» Correct Answer - C
Bone
140.

Write the full form of NADP

Answer» Nictortinamide adenine dinucleotide phosphate
141.

Write the full form of FMN

Answer» Flavin mononucleotide
142.

Blood : Haemoglobin : : Bones : ____________.

Answer» Ossein - Haemoglobin is a protein present in blood whereas, ossein is n protein present is bones.
143.

____________ is present at the tip of the style.A. StigmaB. AntherC. OvaryD. Ovule

Answer» Correct Answer - A
Stigma
144.

_________ is present at the tip of the style.

Answer» Correct Answer - Stigma
145.

Members of gynoecium are called as__________

Answer» Correct Answer - carpels
146.

Bryophyllum, carrot , raddish, Spirogyra.

Answer» Spirogyra- others reproduce by vegetative propagation whereas Spirogyra reproduces by fragmentation.
147.

Two green plants are kept separately in oxygen free containers, one in the dark and the other in continuous light . Which one will live longer ?

Answer» On the other hand , the plant kept in light would be able to carry out photosynthesis and thus convert `CO_(2)` into oxygen. Hence, this plant would live for a longer duration.
148.

One of the following organisms can live without oxygen of air. This organism is:A. AmoebaB. YakC. YeastD. Leech

Answer» Correct Answer - C
149.

During respiration exchange of gases take place inA. bronchiB. alveoliC. bronchiolesD. trachea

Answer» Correct Answer - B
150.

During respiration exchange of gases take place inA. trachea and larynxB. alveoli of lungsC. alveoli and throatD. throat and larynx

Answer» Correct Answer - b
It is in the alveoil in the lungs where gaseous exchange takes place. The walls of the alveoil are very thin and sorrounded by network of very thin blood capillaries. The presence of millions of alveoli in the lungs provides a large area for the exchange of gases.