Reproduction

Step 1: Many body changes occur during adolescence. Step 2: Hygiene of reproductive organs is important at this time. Step 3: Hygiene can reduce the risk of infection.

Step 1: The life of an organism is limited. Step 2: Reproduction produces new offspring. Step 3: Thus a species continues generation after generation.

Step 1: Asexual reproduction has only one parent. Step 2: Offspring receive genetic information from that parent. Step 3: Therefore offspring are usually similar to the parent.

Step 1: Sexual reproduction involves male and female gametes. Step 2: They combine information from two parents. Step 3: This can create more variation in offspring.

Step 1: Growth increases size or cell number of an organism. Step 2: Reproduction produces a new organism. Step 3: So both life processes are different.

Step 1: Spores can be small and light. Step 2: They can remain protected for some time in unfavourable conditions. Step 3: Under favourable conditions they can form a new organism.

Step 1: In vegetative propagation a new plant forms from a part of a plant. Step 2: The new plant is often similar to the parent. Step 3: Thus plants with useful qualities can be multiplied quickly.

Step 1: Stigma is the upper part of pistil. Step 2: Pollen grains land and stick on it. Step 3: Therefore stigma is important in pollination.

Step 1: Ovary is the lower part of pistil. Step 2: It contains ovules. Step 3: After fertilisation ovary can become fruit and ovules can become seeds.

Step 1: Sperm is the male gamete. Step 2: Egg is the female gamete. Step 3: Their fusion forms a zygote.

Step 1: The life of every organism is limited. Step 2: Reproduction produces a new generation. Step 3: Both asexual and sexual reproduction help maintain continuity of species.

Step 1: Living organisms can produce new individuals of their own kind. Step 2: This helps maintain continuity of the species. Step 3: Therefore the process is called reproduction.

Step 1: An organism can live for some time without reproducing. Step 2: But without reproduction new members of that species will not form. Step 3: So reproduction is necessary for continuity of the species.

Step 1: When only one parent forms a new organism there is no fusion of parents. Step 2: Offspring are usually similar to the parent. Step 3: This is called asexual reproduction.

Step 1: In sexual reproduction male and female gametes are formed. Step 2: Their fusion starts the formation of a new organism. Step 3: Therefore it is called sexual reproduction.

Step 1: Asexual reproduction involves one parent. Step 2: The offspring receives genetic information from that parent only. Step 3: So offspring usually look similar to the parent.

Step 1: Amoeba is a unicellular organism. Step 2: It divides its cell into two parts to form new organisms. Step 3: This method is called binary fission.

Step 1: Binary fission means division into two parts. Step 2: The parent cell divides its material. Step 3: Finally two daughter cells are formed.

Step 1: A small outgrowth forms on the body of Hydra. Step 2: This outgrowth grows into a new organism. Step 3: This method is called budding.

Step 1: In budding a small outgrowth appears on the parent body. Step 2: It grows by receiving nutrition. Step 3: Later it may separate and form a new organism.