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5551.

Second male gamete + Two polar nuclei = .................

Answer»

Second male gamete + Two polar nuclei = .................

5552.

Different types of teeth and their function.

Answer»

Different types of teeth and their function.

5553.

(a) What are the various sense organs in our body? (b) What is meant by receptors and effectors ? Give two examples of each.

Answer»

(a) What are the various sense organs in our body?

(b) What is meant by receptors and effectors ? Give two examples of each.

5554.

(a) What is meant by 'tropisms' (or tropic movements )? Explain with an example. (b) What are the different types of tropisms? Define each type of tropism. Write the name of the stimulus in each case. (c) How does tropism differ from nasties (or nastic movements)?

Answer»

(a) What is meant by 'tropisms' (or tropic movements )? Explain with an example.

(b) What are the different types of tropisms? Define each type of tropism. Write the name of the stimulus in each case.

(c) How does tropism differ from nasties (or nastic movements)?

5555.

25. Which of the following is arranged correctly withrespect to sequential events during fertilization?(1) Acrosomal reaction(i) Sperm entry(ii) Slow block to check polyspermy(v) Fast block to check polysperemy(v) Completion of meiotic division of secondaryoocyte(vi) AmphimixisRO

Answer» 25. Which of the following is arranged correctly withrespect to sequential events during fertilization?(1) Acrosomal reaction(i) Sperm entry(ii) Slow block to check polyspermy(v) Fast block to check polysperemy(v) Completion of meiotic division of secondaryoocyte(vi) AmphimixisRO
5556.

Match the pictures that best describe the function of the components of blood given below.

Answer»

Match the pictures that best describe the function of the components of blood given below.


Circulatory



5557.

The gene encoding for hirudin is why cannot isolated from the leeches ?why it get synthesized artificially?

Answer» The gene encoding for hirudin is why cannot isolated from the leeches ?why it get synthesized artificially?
5558.

X is a wild animal which eats only the flesh of other animals whereas Y is a domestic animal which feeds mainly on green grass. (a) What are animals like X known as ? (b) What are animals like Y known as ? (c) Which animal, X or Y, has a longer small intestine ? Why ? (d) Name one animal which is like X. (e) Name one animal which is like Y.

Answer»

X is a wild animal which eats only the flesh of other animals whereas Y is a domestic animal which feeds mainly on green grass.
(a) What are animals like X known as ?
(b) What are animals like Y known as ?
(c) Which animal, X or Y, has a longer small intestine ? Why ?
(d) Name one animal which is like X.
(e) Name one animal which is like Y.

5559.

In germinal cuboidal do the cells of the tissue form gamete?

Answer» In germinal cuboidal do the cells of the tissue form gamete?
5560.

Question 1 Match structures given in Column I with functions given in Column II ColumnIColumnII(i)Stomata(a)Absorption(ii)Xylem(b)Transpiration(iii)Root hairs(c)Transport of food(iv)Leaves(d)Transport of water(e)Synthesis of carbohydrates

Answer» Question 1
Match structures given in Column I with functions given in Column II
ColumnIColumnII(i)Stomata(a)Absorption(ii)Xylem(b)Transpiration(iii)Root hairs(c)Transport of food(iv)Leaves(d)Transport of water(e)Synthesis of carbohydrates
5561.

Protein present in blood, which in the presence of active thrombin gets converted into thin thread like structures that form a mesh.

Answer»

Protein present in blood, which in the presence of active thrombin gets converted into thin thread like structures that form a mesh.


5562.

Give one example each of characters that are inherited and the ones that are acquired in humans. Mention the difference between the inherited and the acquired characters.

Answer» Give one example each of characters that are inherited and the ones that are acquired in humans. Mention the difference between the inherited and the acquired characters.
5563.

epicotyl and hypocotyl hook formation is a type of curvature movement.so it comes under which category growth movement or variation movement.and in them it will be autonomous or induced?

Answer» epicotyl and hypocotyl hook formation is a type of curvature movement.so it comes under which category growth movement or variation movement.and in them it will be autonomous or induced?
5564.

How many types of gametes will be produced in F2 generation of a monohybrid cross of Mendel?

Answer»

How many types of gametes will be produced in F2 generation of a monohybrid cross of Mendel?


5565.

What is the basic structural and functional unit of the nervous system?

Answer»

What is the basic structural and functional unit of the nervous system?


5566.

Name the scientist who gave the theory of evolution

Answer»

Name the scientist who gave the theory of evolution

5567.

Which of these is the primary purpose of meiosis?

Answer»

Which of these is the primary purpose of meiosis?


5568.

______is the reflex centre of brain

Answer» ______is the reflex centre of brain
5569.

Vapour pressure of pure water is 40mm. If a non volatile solute is added to it, vapour pressure falls by 4mm. Calculate molality of solution

Answer» Vapour pressure of pure water is 40mm. If a non volatile solute is added to it, vapour pressure falls by 4mm. Calculate molality of solution
5570.

Match the following: (i) Amphibians and most reptilesA. 2-chambered heart(ii) Birds and mammals B. 3-chambered heart(iii) Fish C.4-chambered heart

Answer»

Match the following:
(i) Amphibians and most reptilesA. 2-chambered heart(ii) Birds and mammals B. 3-chambered heart(iii) Fish C.4-chambered heart


5571.

pi molecular orbital are not cylindrically symmetric about internuclear axis . what does it mean and why?

Answer» pi molecular orbital are not cylindrically symmetric about internuclear axis . what does it mean and why?
5572.

what is the role of antigens present on the surface of cell wall of gram positive bacteria?

Answer» what is the role of antigens present on the surface of cell wall of gram positive bacteria?
5573.

Give any two ways in which biodegradable substances would affect the environment.

Answer» Give any two ways in which biodegradable substances would affect the environment.
5574.

Complète la grille donnée ci-dessous en te référant aux dialogues précédants : A l’épicerie Au marché A la boulangerie A la crémerie A la boucherie 1. du pain 2. 3. du poulet

Answer» Complète la grille donnée ci-dessous en te référant aux dialogues précédants :





































A l’épicerie Au marché A la boulangerie A la crémerie A la boucherie
1. du pain
2.
3. du poulet
5575.

State very briefly the chief function of each of the following: [4 MARKS] (i) Seminal vesicles (ii) Prostate gland (iii) Cowper's gland (iv) Sperm duct (vas deferens)

Answer» State very briefly the chief function of each of the following: [4 MARKS]
(i) Seminal vesicles (ii) Prostate gland (iii) Cowper's gland (iv) Sperm duct (vas deferens)
5576.

1) Does absorbing sample get excited when it absorbs white light in absorbing spectra experiment? Why not? 2)Why white light in absorption spectra experiment is used whereas heat is used in emission spectra experiment to provide energy? 3)Why do electrons not emit radiation when going from lower energy levels to upper? Thanks.

Answer» 1) Does absorbing sample get excited when it absorbs white light in absorbing spectra experiment? Why not?

2)Why white light in absorption spectra experiment is used whereas heat is used in emission spectra experiment to provide energy?

3)Why do electrons not emit radiation when going from lower energy levels to upper?

Thanks.
5577.

if two genes A and B are linked and show 20%recombination ,the proportion of gametes produced by F1 by a dihybrid ++/ab derived from a cross between ++/++ and ab/ ab would be : a. ++=80%;ab=20% b. ++=40%;ab=40%;+a=10%;+b=10% c.++=20%;ab=20%; +a=20%; +b=20% d.++=50%;ab=50%

Answer» if two genes A and B are linked and show 20%recombination ,the proportion of gametes produced by F1 by a dihybrid ++/ab derived from a cross between ++/++ and ab/ ab would be : a. ++=80%;ab=20% b. ++=40%;ab=40%;+a=10%;+b=10% c.++=20%;ab=20%; +a=20%; +b=20% d.++=50%;ab=50%
5578.

Amphibians have __ chambered heart.

Answer»

Amphibians have __ chambered heart.



5579.

Situations The practice session when it is raining.

Answer»

Situations


The
practice session when it is raining.

5580.

Two pea plants, one with round green seeds (RRyy) and another with wrinkled yellow seeds (rrYY) produce F1 progeny that have round yellow seeds. When F1 plants are selfed, the F2 progeny will have new combinations of characters. Choose the new combination of characters from the following:i. Round and yellow seedsii. Round and green seedsiii. Wrinkled and yellow seedsiv. Wrinkled and green seeds

Answer» Two pea plants, one with round green seeds (RRyy) and another with wrinkled yellow seeds (rrYY) produce F1 progeny that have round yellow seeds. When F1 plants are selfed, the F2 progeny will have new combinations of characters. Choose the new combination of characters from the following:



i. Round and yellow seeds

ii. Round and green seeds

iii. Wrinkled and yellow seeds

iv. Wrinkled and green seeds
5581.

Photosynthesis takes place fastest in which color light- blue, yellow ,red, green or white(sunlight)?

Answer»

Photosynthesis takes place fastest in which color light- blue, yellow ,red, green or white(sunlight)?

5582.

What is cudCud

Answer» What is cudCud
5583.

What are the various functions of the brain?

Answer» What are the various functions of the brain?
5584.

Explain mechanisms of sex determination in human being. [5 MARKS]

Answer»

Explain mechanisms of sex determination in human being. [5 MARKS]

5585.

A particular recessive disorder is present in one in ten thousand individuals. If the population is in Hardy-Weinberg equilibrium, what are the frequencies of the 2 alleles?

Answer» A particular recessive disorder is present in one in ten thousand individuals. If the population is in Hardy-Weinberg equilibrium, what are the frequencies of the 2 alleles?
5586.

Which of following vitamin is vitamin of alicyclic series?1)Vitamin K2)Vitamin C3)Vitamin B4)Vitamin A

Answer» Which of following vitamin is vitamin of alicyclic series?
1)Vitamin K
2)Vitamin C
3)Vitamin B
4)Vitamin A
5587.

The exchange of genetic material takes place in : (a) vegetative reproduction (b) asexual reproduction (c) sexual reproduction (d) budding

Answer»

The exchange of genetic material takes place in :

(a) vegetative reproduction (b) asexual reproduction (c) sexual reproduction (d) budding

5588.

According to the arrangement of the centromere, identify the chromosomes.

Answer»

According to the arrangement of the centromere, identify the chromosomes.


5589.

Which section of cerebrum performs reasoning, planning, speech, movement, emotions & problem solving actions?

Answer»

Which section of cerebrum performs reasoning, planning, speech, movement, emotions & problem solving actions?


5590.

Explain briefly the relationship between poverty and population and how one affects the other.

Answer»

Explain briefly the relationship between poverty and population and how one affects the other.

5591.

A ______ is one of the replicated copies of a chromosome.

Answer»

A ______ is one of the replicated copies of a chromosome.


5592.

Statement 1: The chamber just behind the cornea consists of vitreous humour. Statement 2: Melanin is present in the choroid layer of the eye.

Answer»

Statement 1: The chamber just behind the cornea consists of vitreous humour.

Statement 2: Melanin is present in the choroid layer of the eye.


5593.

Name two inorganic substances which are used by autotrophs to make food.

Answer»

Name two inorganic substances which are used by autotrophs to make food.

5594.

Which of the following receptors are found on the skin?

Answer»

Which of the following receptors are found on the skin?


5595.

Lichen can be used as industrial pollution indicators because

Answer» Lichen can be used as industrial pollution indicators because
5596.

What is the position of foramen of magendie, foramen magnum and luschka?

Answer» What is the position of foramen of magendie, foramen magnum and luschka?
5597.

Period of growth in animals is called

Answer»

Period of growth in animals is called



5598.

Describe reproduction by spores in Rhizopus.

Answer» Describe reproduction by spores in Rhizopus.
5599.

Is cumulus oophorous seen in primary follicle as well??

Answer» Is cumulus oophorous seen in primary follicle as well??
5600.

What are the abnormalities caused due to the decrease in secretion of thyroxine?

Answer»

What are the abnormalities caused due to the decrease in secretion of thyroxine?