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1251.

In a sanctuary:

Answer»

In a sanctuary:


1252.

Is auxin are also responsible for cell division?

Answer» Is auxin are also responsible for cell division?
1253.

Define the following terms: [5 MARKS] (a) Natural immunity (b) Acquired immunity (c) Active immunity (d) Passive immunity (e) Sulphonamides

Answer» Define the following terms: [5 MARKS]
(a) Natural immunity
(b) Acquired immunity
(c) Active immunity
(d) Passive immunity
(e) Sulphonamides
1254.

Suggest measures in following situations.To avoid noise pollution in classroom.

Answer»

Suggest measures in following situations.



To avoid noise pollution in classroom.

1255.

Which cell plays a major role in the process of photosynthesis in plants?

Answer»

Which cell plays a major role in the process of photosynthesis in plants?


1256.

What is stimulus and response?

Answer»

What is stimulus and response?

1257.

If thita1=7/25 and thita2=24/25 then find relation between thita1 and thita2

Answer» If thita1=7/25 and thita2=24/25 then find relation between thita1 and thita2
1258.

If any inheritable mutation is observed in a population at high frequency, it is referred to as

Answer»

If any inheritable mutation is observed in a population at high frequency, it is referred to as



1259.

Most of the energy synthesized by mitochondria comes from the process of cellular ___.

Answer»

Most of the energy synthesized by mitochondria comes from the process of cellular ___.


1260.

Consider the following statements and choose the correct answer. I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with protein side chain. II. Different types of proteins present in the membrane play a major role in both active as well as passive transport. III. The carrier proteins needed by facilitated and active transport are specific. IV. There is no need of energy to pump molecule against a concentration gradient in active transport. V. Transport rate reaches to saturation point, when all the active proteins are used.

Answer»

Consider the following statements and choose the correct answer.

I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with protein side chain.

II. Different types of proteins present in the membrane play a major role in both active as well as passive transport.

III. The carrier proteins needed by facilitated and active transport are specific.

IV. There is no need of energy to pump molecule against a concentration gradient in active transport.

V. Transport rate reaches to saturation point, when all the active proteins are used.


1261.

What is the B​​​​​​​​​​​​IG BANG ?

Answer» What is the B​​​​​​​​​​​​IG BANG ?
1262.

Now, write a letter to your school-going younger brother or sister who is sleep-deprived. Advise him or her to make lifestyle changes to his/her daily schedule in order to get the desired hours of sleep daily.

Answer»

Now, write a letter to your school-going younger brother or sister who is sleep-deprived. Advise him or her to make lifestyle changes to his/her daily schedule in order to get the desired hours of sleep daily.

1263.

How are natural and induced clones formed?

Answer»

How are natural and induced clones formed?

1264.

Which among the following is not the function of melatonin?

Answer»

Which among the following is not the function of melatonin?


1265.

What is dry distillation?? Why the word green is uses in greenouse gases..why is it not black as black absorbs heat. While green doesn't much??

Answer»

What is dry distillation??

Why the word green is uses in greenouse gases..why is it not black as black absorbs heat. While green doesn't much??

1266.

What do you understand by the following terms? [5 MARKS] (a) Health (b) Antigens (c) Innate immunity (d) Gamma globulin (e) Antitoxin

Answer» What do you understand by the following terms? [5 MARKS]
(a) Health
(b) Antigens
(c) Innate immunity
(d) Gamma globulin
(e) Antitoxin
1267.

Answer the following.Describe the main sources of water pollution.

Answer»

Answer the following.



Describe the main sources of water pollution.

1268.

Question 2AIDS can spread from an infected person to another person through(a) Sharing food(b) Blood transfusion(c) Sharing comb(d) A mosquito bite

Answer» Question 2

AIDS can spread from an infected person to another person through



(a) Sharing food

(b) Blood transfusion

(c) Sharing comb

(d) A mosquito bite
1269.

Which plant hormone promotes cell division and cell differentiation along with auxin?

Answer»

Which plant hormone promotes cell division and cell differentiation along with auxin?



1270.

Which of these statements is correct regarding blood pressure?

Answer»

Which of these statements is correct regarding blood pressure?


1271.

What is the function of roots?

Answer»

What is the function of roots?
1272.

A three-dimensional image of an object is formed in the:

Answer»

A three-dimensional image of an object is formed in the:


1273.

what is the function of neutrophils?

Answer» what is the function of neutrophils?
1274.

Plasma membrane is

Answer»

Plasma membrane is


1275.

Breathing is controlled by a centre in the

Answer»

Breathing is controlled by a centre in the



1276.

What are the hormones secreted by the pituitary gland

Answer» What are the hormones secreted by the pituitary gland
1277.

How does our body work?

Answer» How does our body work?
1278.

Define the term sewage.Name the two chemicals that are used to disinfect water? [2 MARKS]

Answer»

Define the term sewage.Name the two chemicals that are used to disinfect water? [2 MARKS]

1279.

Asexual reproduction is good because it:

Answer»

Asexual reproduction is good because it:


1280.

A portion of each of four destarched leaves of a plant was covered with paper strips of various kinds. The plant was exposed to sunlight for 5 hours. Thereafter, the strips were removed and the leaves tested for starch in the covered portion. Which one out of the four leaves gave the starch test in the covered portion?(1) that covered with black paper strip(2) that covered with green paper strip(3) that covered with white paper strip(4) that covered with transparent paper strip

Answer» A portion of each of four destarched leaves of a plant was covered with paper strips of various kinds. The plant was exposed to sunlight for 5 hours. Thereafter, the strips were removed and the leaves tested for starch in the covered portion. Which one out of the four leaves gave the starch test in the covered portion?

(1) that covered with black paper strip

(2) that covered with green paper strip

(3) that covered with white paper strip

(4) that covered with transparent paper strip
1281.

A pea plant with yellow and round seeds is crossed with another pea plant with green and wrinkled seeds produced 51 yellow round seeds and 49 yellow wrinkled seeds.Gnotype of plant with yellow round seeds must bea)YYRr b)YyRrc)YyRR d)YYRR

Answer» A pea plant with yellow and round seeds is crossed with another pea plant with green and wrinkled seeds produced 51 yellow round seeds and 49 yellow wrinkled seeds.Gnotype of plant with yellow round seeds must be
a)YYRr b)YyRr
c)YyRR d)YYRR
1282.

Structure that carries urine out of the kidneys is ____________.

Answer»

Structure that carries urine out of the kidneys is ____________.


1283.

What is reflex arc ?

Answer»

What is reflex arc ?

1284.

Name the male and female sex hormones and the organ secreting it? [2 MARKS]

Answer»

Name the male and female sex hormones and the organ secreting it? [2 MARKS]

1285.

Match the following: Column IColumn II(i). Vellus haira. Surround and support the glandular tissue(ii). Acinib. Regulates temperature(iii). Oxytocin, prolactin, progesteronec. Modified sweat gland(iv). Fatty tissued. Milk producing cuboidal cells (v). Breaste. Regulate pregnancy and lactation

Answer»

Match the following:
Column IColumn II(i). Vellus haira. Surround and support the glandular tissue(ii). Acinib. Regulates temperature(iii). Oxytocin, prolactin, progesteronec. Modified sweat gland(iv). Fatty tissued. Milk producing cuboidal cells (v). Breaste. Regulate pregnancy and lactation


1286.

The loss of water from the surface of plants is called ___ .

Answer»

The loss of water from the surface of plants is called ___ .


1287.

Why are acquired traits not inherited

Answer»

Why are acquired traits not inherited

1288.

Theory of Natural selection was given by

Answer»

Theory of Natural selection was given by


1289.

Brief note about endoplasmic reticulum [ In point wise]

Answer» Brief note about endoplasmic reticulum

[ In point wise]
1290.

In which of the following functions, white muscles are not required or used?

Answer»

In which of the following functions, white muscles are not required or used?


1291.

Why do humans have different types of blood group? Like some have O+,B+,B-,AB+,etc

Answer»

Why do humans have different types of blood group? Like some have O+,B+,B-,AB+,etc

1292.

Sketch the labeled diagrams:a. Human male reproductive systemb. Human female reproductive systemc. Flower with its sexual reproductive organsd. Menstrual cycle

Answer» Sketch the labeled diagrams:

a. Human male reproductive system

b. Human female reproductive system

c. Flower with its sexual reproductive organs

d. Menstrual cycle
1293.

What is gene therapy?

Answer»

What is gene therapy?



1294.

(a) Why did Hershey and Chase use radioactive 32P and 35S in their experiments? Explain.(b) Following the experiments conducted by them, write what conclusion did they arrive at and how. [5 marks]

Answer» (a) Why did Hershey and Chase use radioactive 32P and 35S in their experiments? Explain.



(b) Following the experiments conducted by them, write what conclusion did they arrive at and how. [5 marks]
1295.

The colour of the iris is determined by the presence of _________.

Answer»

The colour of the iris is determined by the presence of _________.



1296.

Respiration and breathing are the same. Do you agree? Give reasons.

Answer» Respiration and breathing are the same. Do you agree? Give reasons.
1297.

Does respiration can occur in the absence of oxygen

Answer»

Does respiration can occur in the absence of oxygen

1298.

The plant capable of producing white flowers consist of more red flowers in number over white flowers. It indicates that

Answer»

The plant capable of producing white flowers consist of more red flowers in number over white flowers. It indicates that



1299.

5. How is digestion in amoeba different from that in mushroom?

Answer» 5. How is digestion in amoeba different from that in mushroom?
1300.

12.a) Name the blood vessel that brings deoxygenated blood to human heart. b) Which chamber of human heart receives deoxygenated blood? c) Explain how deoxygenated blood from this chamber is sent to lungs for oxygenation. (3)

Answer» 12.a) Name the blood vessel that brings deoxygenated blood to human heart.
b) Which chamber of human heart receives deoxygenated blood?
c) Explain how deoxygenated blood from this chamber is sent to lungs for oxygenation. (3)