[IMP] Class 10 Term 2 Biology Important Diagram

We are presenting here some important diagrams from CBSE Class 10 Biology subject. By learning the biology diagrams, students can easily visualise their topics and retain the concepts for a long time in their brain. Questions based on these diagrams are often asked in the CBSE Board Exams. With this article, students can revise all the important diagrams in very little time and prepare well to score high in their CBSE Class 10 Science Term 2 Exam.

1. Human Male Reproductive System

It consists of the following parts:

• Testicles (testes): A pair of oval-shaped organ masked in a pouch called scrotum. Testes are responsible for the production of the sperms and male hormone, testosterone.

• Epididymis: The sperms formed in testes come out and go into a coiled tube called epididymis. Here the sperms get matured.

• Vas deferens:  From epididymis, sperms are passed to urethra through the muscular tube called vas deferens.

• Accessory glands: This includes three glands namely, seminal vesicles, prostate gland, and Cowper’s gland. The secretions from the three glands mix to form a fluid called semen. Semen nourishes the sperm, increases the volume and helps in lubrication.

• Penis: Penis is a cylindrical tube which serves as both reproductive organ as well as excretory organ. It delivers sperms into the vagina during sexual intercourse.

2. Human Female Reproductive System

It consists of the following parts:

• A pair of ovaries: Ovaries produce and store ovum in them. They also produce a female hormone called estrogen.

• Fallopian tubes (Oviducts): They are the site of fertilization. They connect ovaries with the uterus.

• Uterus: Uterus is the site of development for the embryo.

• Cervix: It is located at the lowermost portion of the uterus and is involved in connecting the uterus and the vagina.

• Vagina: It is the part which connects cervix to the external female body parts. It is the route for penis during coitus as well as a foetus during delivery.

3. Budding in Yeast and Hydra

Budding is a method of reproduction in unicellular organisms like yeast and hydra. In this method a bud like projection is formed on the body of the organism. The bud then develops into a new individual. It then separates from the parent and forms an independent individual.

4. Regeneration in Planaria and Hydra

Regeneration is a method of reproduction in which a part of the body of an organism if cut or broken, can develop into a new individual.

5. Fragmentation in Spirogyra

In this method the body of a simple multicellular organism breaks up into smaller pieces on maturation and each fragment develops into new individuals.

6. Longitudinal Section (LS) Of A Flower

This flower contains both male and female reproductive parts. The female reproductive part of the flower is known as pistil or carpel. It consists of three subsections stigma, stile and ovary as shown in the following diagram of longitudinal section of flower.

The male reproductive part of the flower is known as stamen. It consists of two subsections anther and filament which are clearly shown in the longitudinal section of flower.

7. Germination of Pollen on Stigma (Fertilisation in flowering plants)

After the pollen grain is transferred to the stigma it produces a pollen tube which passes through the style and enters the ovary and ovule. In the ovule the male germ cell fuses with the female germ cell to produce zygote. This process of formation of single celled zygote is called fertilisation. Zygote then divides several times and forms the embryo which then develops into the seed and the ovary develops into the fruit.

8. Mendel’s Dihybrid Cross

Mendel selected pea plants having two pairs of characters- shape and colour of seeds.He selected plants having round yellow seeds (RRYY) and wrinkled green seeds (rryy) and cross pollinated them. He obtained all plants with round yellow seeds (RrYy) in F1 generation. When these plants were self pollinated in the F2 generation then out of 16 plants, 9 had round yellow (RrYy) seeds, 3 had round green (Rryy) seeds, 3 had wrinkled yellow (rrYy) seeds and 1 had wrinkled green (rryy) seeds. So, in F2 generations 4 different traits wrinkled-yellow, round-yellow, wrinkled-green seeds and round-green were obtained in the ratio 9:3:3:1. 

9. Binary fission in leishmenia

I hope this Class 10 science important diagram help you a lot, and I think you have learn the Class 10 science important diagram and now I can gurantee that if you have learn the Class 10 science important diagram properly than you can score full marks in Class 10 board exam, this Class 10 science important diagram will also help in your periodic test ,So Let’s Crack CBSE board exam with Class 10 science important diagram

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