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Energy released during respiration is stored in the cell as ____.

What are the major hazards of nuclear power plant?

Blue eye colour in human is recessive to brown eye colour. The expected children of a blue-eyed woman and a brown-eyed man who had a blue-eyed mother is likely to be in the ratio of:

An example of an organism in which females are the heterogametic sex and males are homogametic is:

Downward movement of sap has the help of

he amount of which of the following factors does not affect the rate of photosynthesis?

Ventricles are thick walled as compared to auricles because

Seed should not be sown on the soil nor should it be sown deep in the soil. Give reason and explain what happens if it is sown in either of the above cases.

Question 28

Mention three important features of fossils which help in the study of evolution.

Question 32

A junction between two neurons is called



(a) cell junction

(b) neuro muscular junction

(c) neural joint

(d) synapse

1. menstruation starts.


2. breasts start developing.


3. body weight increases.


4. height increases.

The human males use a device X made of a very thin rubber sheet as a covering on the male organ to prevent pregnancy. This device traps the gametes Y in it. In order to prevent pregnancy, the human females use a device Z which is a circle of rubber with a metal spring around it. The device Z is put inside the vagina to cover the cervix. It stops Y from going into the uterus.
(a) What is device X?
(b) What are Y?
(c) Name the device Z.
(d) What is the general name of these methods of birth control (or preventing pregnancy)?
(e) The use of which contraceptive device, X or Z, can protect the persons from sexually transmitted diseases? ,

Which of the following is the difference between DNA and RNA?

Which other system helps the endocrine system to control and co-ordinate the working of the body?

What is fission? Explain with example.

As for Loona Bimberton,
she refused to look at an illustrated paper for weeks, and her letter
of thanks for the gift of a tiger-claw brooch was a model of
repressed emotions

________________________________________________

________________________________________________

What do we know about the permeability of the cell membrane?

Q44. Which of the following statements is/are correct with regard to International Tropical Timber Organization (ITTO)?

1. It has been established under the auspices of the United Nations.

2. India is among the members of ITTO.

Which of the above statement(s) is/are correct?

One of the following acts as an endocrine gland as well as an exocrine gland. This one is :

(a) salivary gland

(b) pancreas

(c) pituitary

(d) parathyroid

Identify if each of the following statements are true or false. Mark as T, if they are true and F if they false and select the answer option with the correct answer.



I. Food is essential for all living beings.

II. All plants are autotrophs.

III. Iodine solution is used to test the presence of proteins.

IV. Speech is a life process.

V. Carbon dioxide is a by – product of photosynthesis.

Egg apparatus of embryo sac has egg cell and synergids. The ploidy level and number of respective cells are

Where are the female sex cells of a flower found?

Industrial microbiology deals with the study of ___.

Why are asexually reproducing organisms more capable of showing the hereditary features? [2 MARKS]

Why is liger unfertile when tiger and lion belong to the same species

Question 15
Length of pollen tube depends on the distance between

(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style

Development of offsprings identical to their parents is the result of:

AIDS , ADOLESCENCE AND SEX EDUCATION

All substances that are sweet in taste are considered as sugar.

Identify the correct relationship about water potential of a plant cell.

Given below is a sample of the portion of a DNA strand with the complementary base sequence on the opposite strand. What does this sequence represent?
5'-GAATTC-3'
3'-CTTAAG-5'

Match the following with the organs and the cells they produce through meiosis:

Important processes like blood flow, heartbeat, digestion, and breathing are carried out by ___ system.

Mark the correct pairs(s) with respect to post fertilization structure & events in flowering plants.

(a) Integuments – Pericarp

(b) Definitive nucleus – Endosperm

(c) Synergids – Degenerate

(d) Micropyle – Hilum

P in the heart have thicker muscular walls than Q do. Also, R ensure that blood does not flow backwards when the atria or ventricles contract.

P is ___

Q is ___

and R is ___

what do you mean by fermentation explain the procedure in details