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Name the organs which produce eggs (or ova) in humans.

Question 7

Which of the following can make you ill if you come in contact with an infected person?



(a) High blood pressure

(b) Genetic abnormalities

(c) Sneezing

(d) Blood cancer

Which of the following is a disadvantage of tilling?

(क) अपने घर के बरामदे में खड़े होकर छ: वर्षीय विश्वेश्वरैया ने क्या देखा?

(ख) तुम्हें विश्वेश्वरैया की कौन सी बात सबसे अच्छी लगी? क्यों?

(ग) विश्वेश्वरैया के मन में कौन-कौन से सवाल उठते थे?

Who are hunter gatherers

Question 45

There is mass mortality of fishes in a pond. What may be the reasons?

What is common among the following crops - Millet, maize, sugarcane and cotton?

HIV
mainly effects

How can pesticides enter food chain and harm human beings? "I want a long answer for my project"

Question 17

Select the group which shares maximum number of common characters.



(a) Two individuals of a species

(b) Two species of a genus

(c) Two genera of a family

(d) Two genera of two families

From the following figures, find the unicellular organisms.

(a) What is the basic difference asexual and sexual reproduction ?

(b) Which of the following organisms reproduce by sexual method and which by asexual method ?

Amoeba, Cats, Humans, Hydra, Birds

Are there any advantages of moat irrigation method? Something that could prove that traditional method is better than modern method? Like for debates

What is the type of reproduction which begins with the fusion of male and female
gametes?

Arrange the following soil types according to their properties:

Photorespiration lowers the efficiency of photosynthesis by preventing the formation of

Agriculture involves cultivation and farming of plants of the same kind on a large scale which are known as _____ .

Write a short note on a ozone hole.

The major pigments in Phaeophyceae are

Which of these are heterosporous plants?

There are 500 children in a school. For a P.T. drill they have to stand in such a manner that the number of rows is equal to number of columns. How many children would be left out in this arrangement?

Question 53

Draw a plant cell and label the parts which

(a)Determines the function and development of the cell

(b)Packages materials coming from the endoplasmic reticulum

(c)Provides resistance to microbes to withstand hypotonic external media without bursting

(d) Is the site for many biochemical reactions necessary to sustain life.

(e) Is a fluid contained inside the nucleus

Identify the gland from the following clues.

In cheese manufacturing, microorganisms are important for:

Word game: Use the clues to work out the words.

Across

3. Protruding voice box in boys

4. Glands without ducts

7. Endocrine gland attached to brain

8. Secretion of endocrine glands

9. Pancreatic hormone

10. Female hormone

Down

1. Male hormone

2. Secretes thyroxin

3. Another term for teenage

5. Hormone reaches here through blood stream

6. Voice box

7. Term for changes at adolescence

Word game:
Use the clues to work out the words.

Across

3. Protruding
voice box in boys

4. Glands
without ducts

7. Endocrine
gland attached to brain

8. Secretion
of endocrine glands

9. Pancreatic
hormone

10. Female
hormone

Down

1. Male
hormone

2. Secretes
thyroxin

3. Another
term for teenage

5. Hormone
reaches here through blood stream

6. Voice
box

7. Term
for changes at adolescence

The red colour of RBC is due to the presence of

Which of the following contain ribosomes?

The skin, covering our body is made up of which type of tissues?

Which hormone is responsible for the monthly preparation of uterus for pregnancy?

The first word of a scientific name of an organism indicates its

Question 36
Read the following statements and write the appropriate term against each statement.

A. I control the functions of a cell. Who am I?___

B. I am like a policeman. I do not allow anything and everything to get in and out of the cell. Who am I? ___

C. I transfer characters from parents to offsprings. Who am I? ___