Read the passage given below and answer the following questions from (i) to (v).

Reproduction is a biological process by which new individual organisms are produced. Reproduction is a fundamental feature of all life forms; each individual exists due to the process of reproduction. Reproduction is the mechanism of species continuation. Mechanism and process of reproduction varies for different species in this world.

(i) Which of the following statement is not true about reproduction?

Read the passage given below and answer the following questions from (i) to (v).

Reproduction is a biological process by which new individual organisms are produced. Reproduction is a fundamental feature of all life forms; each individual exists due to the process of reproduction. Reproduction is the mechanism of species continuation. Mechanism and process of reproduction varies for different species in this world.

(ii) The ability of cell to divide into several cells during reproduction in Plasmodium is called _________.

Read the passage given below and answer the following questions from (i) to (v).

Reproduction is a biological process by which new individual organisms are produced. Reproduction is a fundamental feature of all life forms; each individual exists due to the process of reproduction. Reproduction is the mechanism of species continuation. Mechanism and process of reproduction varies for different species in this world.

(iii) Vegetative propagation is a type of:

Read the passage given below and answer the following questions from (i) to (v).

Reproduction is a biological process by which new individual organisms are produced. Reproduction is a fundamental feature of all life forms; each individual exists due to the process of reproduction. Reproduction is the mechanism of species continuation. Mechanism and process of reproduction varies for different species in this world.

(iv) Organisms in which reproduction is a function of a specific cell type are:

Read the passage given below and answer the following questions from (i) to (v).

Reproduction is a biological process by which new individual organisms are produced. Reproduction is a fundamental feature of all life forms; each individual exists due to the process of reproduction. Reproduction is the mechanism of species continuation. Mechanism and process of reproduction varies for different species in this world.

(v) Which one of the following is not a method of reproduction?

Read the passage given below and answer the following questions from (i) to (v).

Asexual reproduction, in which offspring arise from a single organism, occurs in a variety of prokaryotes and eukaryotes including plants, fungi, and animals. It may have some advantages over the sexual reproduction, in which individuals of two genders, females and males, must be involved but only females can give birth to new individuals. There are several different methods of asexual reproduction. Asexual reproduction can be very rapid. This is an advantage for many organisms. It allows them to crowd out other organisms that reproduce more slowly.

(i) Budding is a mode of asexual reproduction in:

Read the passage given below and answer the following questions from (i) to (v).

Asexual reproduction, in which offspring arise from a single organism, occurs in a variety of prokaryotes and eukaryotes including plants, fungi, and animals. It may have some advantages over the sexual reproduction, in which individuals of two genders, females and males, must be involved but only females can give birth to new individuals. There are several different methods of asexual reproduction. Asexual reproduction can be very rapid. This is an advantage for many organisms. It allows them to crowd out other organisms that reproduce more slowly.

(ii) The specific reproductive part in Rhizopus responsible for reproduction is:

Read the passage given below and answer the following questions from (i) to (v).

Asexual reproduction, in which offspring arise from a single organism, occurs in a variety of prokaryotes and eukaryotes including plants, fungi, and animals. It may have some advantages over the sexual reproduction, in which individuals of two genders, females and males, must be involved but only females can give birth to new individuals. There are several different methods of asexual reproduction. Asexual reproduction can be very rapid. This is an advantage for many organisms. It allows them to crowd out other organisms that reproduce more slowly.

(iii) Buds produced in the notches along the leaf margin of Bryophyllum fall on the soil and develop into new plants. This is an example of:

Read the passage given below and answer the following questions from (i) to (v).

Asexual reproduction, in which offspring arise from a single organism, occurs in a variety of prokaryotes and eukaryotes including plants, fungi, and animals. It may have some advantages over the sexual reproduction, in which individuals of two genders, females and males, must be involved but only females can give birth to new individuals. There are several different methods of asexual reproduction. Asexual reproduction can be very rapid. This is an advantage for many organisms. It allows them to crowd out other organisms that reproduce more slowly.

(iv) Hydra and Planaria can be cut into any number of pieces and each piece grows into a complete organism. This is known as:

Read the passage given below and answer the following questions from (i) to (v).

Asexual reproduction, in which offspring arise from a single organism, occurs in a variety of prokaryotes and eukaryotes including plants, fungi, and animals. It may have some advantages over the sexual reproduction, in which individuals of two genders, females and males, must be involved but only females can give birth to new individuals. There are several different methods of asexual reproduction. Asexual reproduction can be very rapid. This is an advantage for many organisms. It allows them to crowd out other organisms that reproduce more slowly.

(v) In amoeba the splitting of the two cells during division can take place in ______ plane.

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is the most common method of reproduction in animals and plants. One male and one female parent are involved in the process of sexual reproduction. Sexual reproduction involves fusion of two types of reproductive cells known as gametes to form a single cell called zygote. The zygote multiplies repeatedly and undergoes specific changes to form a new individual.

(i) What is the source of variations in populations of organisms?

 Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is the most common method of reproduction in animals and plants. One male and one female parent are involved in the process of sexual reproduction. Sexual reproduction involves fusion of two types of reproductive cells known as gametes to form a single cell called zygote. The zygote multiplies repeatedly and undergoes specific changes to form a new individual.

(ii) The reproductive parts of angiosperms are located in the:

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is the most common method of reproduction in animals and plants. One male and one female parent are involved in the process of sexual reproduction. Sexual reproduction involves fusion of two types of reproductive cells known as gametes to form a single cell called zygote. The zygote multiplies repeatedly and undergoes specific changes to form a new individual.

(iii) _____ is the male reproductive part in a plant and produces pollen grains that are yellowish in colour.

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is the most common method of reproduction in animals and plants. One male and one female parent are involved in the process of sexual reproduction. Sexual reproduction involves fusion of two types of reproductive cells known as gametes to form a single cell called zygote. The zygote multiplies repeatedly and undergoes specific changes to form a new individual.

(iv) In plants, after fertilisation, the zygote divides several times to form an embryo within the ovule.
The ovule develops a tough coat and is converted gradually into a:

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is the most common method of reproduction in animals and plants. One male and one female parent are involved in the process of sexual reproduction. Sexual reproduction involves fusion of two types of reproductive cells known as gametes to form a single cell called zygote. The zygote multiplies repeatedly and undergoes specific changes to form a new individual.

(v) As the rate of general body growth begins to slow down, reproductive tissues begin to mature. This period during adolescence is known as:

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is a method to give rise to one’s progeny. In higher animals, male and female gametes are produced by different individuals to carry out sexual reproduction. Such individuals are said to be unisexual. However, in some animals like flatworm, earthworm, leech, and hydra both male and female gametes are produced by the same individual. Such organisms are said to be hermaphrodites or bisexual. Male and female gametes fertilise to form a zygote that has trail of characters from both the parents.

(i) Where does fertilisation occur in human females?

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is a method to give rise to one’s progeny. In higher animals, male and female gametes are produced by different individuals to carry out sexual reproduction. Such individuals are said to be unisexual. However, in some animals like flatworm, earthworm, leech, and hydra both male and female gametes are produced by the same individual. Such organisms are said to be hermaphrodites or bisexual. Male and female gametes fertilise to form a zygote that has trail of characters from both the parents.

(ii) The offspring formed by sexual reproduction exhibit more variations because ________.

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is a method to give rise to one’s progeny. In higher animals, male and female gametes are produced by different individuals to carry out sexual reproduction. Such individuals are said to be unisexual. However, in some animals like flatworm, earthworm, leech, and hydra both male and female gametes are produced by the same individual. Such organisms are said to be hermaphrodites or bisexual. Male and female gametes fertilise to form a zygote that has trail of characters from both the parents.

(iii) Why are pollens spiny?

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is a method to give rise to one’s progeny. In higher animals, male and female gametes are produced by different individuals to carry out sexual reproduction. Such individuals are said to be unisexual. However, in some animals like flatworm, earthworm, leech, and hydra both male and female gametes are produced by the same individual. Such organisms are said to be hermaphrodites or bisexual. Male and female gametes fertilise to form a zygote that has trail of characters from both the parents.

(iv) What is the principle of natural contraceptive methods?

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is a method to give rise to one’s progeny. In higher animals, male and female gametes are produced by different individuals to carry out sexual reproduction. Such individuals are said to be unisexual. However, in some animals like flatworm, earthworm, leech, and hydra both male and female gametes are produced by the same individual. Such organisms are said to be hermaphrodites or bisexual. Male and female gametes fertilise to form a zygote that has trail of characters from both the parents.

 (v) The number of chromosomes present in parents and offspring of a particular species remains constant due to ________.

The below given picture shows a few methods of contraception and avoiding sexually transmitted diseases in humans. See the picture carefully and answer the following questions from (i) to (v).

(i) Which one out of the below given terms is STD?

The below given picture shows a few methods of contraception and avoiding sexually transmitted diseases in humans. See the picture carefully and answer the following questions from (i) to (v).

(ii) IUCD is used for:

The below given picture shows a few methods of contraception and avoiding sexually transmitted diseases in humans. See the picture carefully and answer the following questions from (i) to (v).

(iii) Use of condom for contraception is a:

The below given picture shows a few methods of contraception and avoiding sexually transmitted diseases in humans. See the picture carefully and answer the following questions from (i) to (v).

(iv) The best way to avoid Sexually Transmitted Diseases is by use of:

The below given picture shows a few methods of contraception and avoiding sexually transmitted diseases in humans. See the picture carefully and answer the following questions from (i) to (v).

(v) Which one of the following statements is not true?