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Given below are hypothetical figures in regard to population (in crores) of two countries A and B during the last three decades.
$$\begin{array}{cccc}Country& 1971& 1981& 1991\\ A& 6.4& 9.6& 10.6\\ B& 15.7& 15.7& 15.3\end{array}$$
Fill in the blanks:
(a) Rate of growth of the population of the country _____ has declined between years ______ and ________ .
(b) The country _______ shows negative population growth between years _______ shows negative population growth between years ____ and ______.
(c) The country _______ shows zero population growth between years __________ and _________ .

One of the following is a mismatch

Which of the following is the innermost membrane covering the brain?

A cross is made between true-breeding lines of pea plants with axillary and terminal flowers. If 1240 progeny are obtained, what is the ratio between homozygous plants and heterozygous plants of $F_2$ progeny?

List three ways in which neurons are similar to other cells.

The hormones secreted by the anterior lobe of the pituitary gland that acts on gonads is/are_____

Erythropenia refers to a condition marked by an abnormal

How is oxygen transported in human beings?

_{^{rajesh's grandfather was feeling thirsty most of time. he was feeling tired and had excess of urination. rajesh took him to doctor. doctor gave him medicine and asked him to go for walking everyday. he also advised him to take artificial sweetener instead of sugar.}}

_{^{a)what values are associated with rajesh?}}

_{^{b) Name the disease rajesh's grandfather was suffering from.}}

The ability of a cell to divide into several cells during reproduction in Plasmodium is called :
(a) budding
(b) fragmentation
(c) binary fission
(d) multiple fission

The average temperature of the Earth remains fairly steady as compared to that of the moon because of the

Identify the process in the image _____.

Assuming black fur is dominant over brown fur in rabbit, what would the genotype of rabbits that are heterozygous for coat colour?

Planting trees along roads, wastelands and mountain slopes

Try to collect all the currently accepted meanings for the word species. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand and bacteria on the other hand.

Complete the following table by writing the name of the structure or the function of the given structure :

Structure Function

1. Corpus luteum 1. .................

2. ................... 2. Produces male gametes in mass.

3. Placental disc 3. ....................

4. ....................... 4. Increases the force in uterine contraction

5. Umbilical cord. 5. ................

6. Fallopian tube 6. ................

Terrestrial plants lose most of the water absorbed through __ from the leaves.

If a tall plant crossed with a dwarf plant, this type of cross is called_______.

When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of :
(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour

In a flower, the parts that produce male and female gametes are respectively :
(a) sepal and anther
(b) filament and stigma
(c) anther and ovary
(d) stamen and style

Which evolutionary process would best account for the observation that there is a striking similarity in both form and function of the enlarged horns observed in males of some insects and some mammals?

A person suffering from kidney stones is advised to avoid excess intake of spinach and beetroots in his diet. What could be the possible reason?

If a male that is homozygous recessive for a trait is crossed with a female that is homozygous recessive for the same trait, what is the possibility of them having offspring with the recessive trait?

Where is digested food absorbed into blood in human body ?

Where does the fertilization of egg in female reproductive system take place ?

What is Immunity?

An aquatic food chain comprises the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is :

(a) water beetles (b) tadpoles (c) weeds (d) fish

Why do people have a common belief that the heart is located on the left side of the chest?

Which device is used to convert solar energy of the sunlight to electrical energy?

Which of the following human ancestors were the first to hunt animals and use fire?

What is the term used for the waste that originates mainly from hospitals and clinics?

Mendel conducted his experiments on which plants?

What is the persistence of vision for normal eye ?

List the three major constituents of sewage.

Properties of cells were described by which theory?

In the surgical method of birth control available for human females, the structures P in the reproductive system are cut and ligated (tied up) properly at both ends. This prevents the reproductive cell Q released by an organ R from entering the structures P so that Q is not available to fuse with another reproductive cell S coming from the male reproductive system. In this way, pregnancy is prevented.
(a) What are the structures P?
(b) What is cell Q?
(c) Name the organ R.
(d) What is the reproductive cell S?
(e) What is the name of this surgical method of birth control available to females?

Explain why, it is dangerous to inhale air containing carbon monoxide.

What is the name of the instrument shown in the following image?

Plants do not have a nervous system they do not show any kind of coordination do you agree with the statement why or why not