MP Board (MPBSE) Class 12 Biology Previous Year Question Paper 2018 with Solutions - Free PDF Download
FAQs on Madhya Pradesh Board (MPBSE) Previous Year Question Paper for Class 12 Biology 2018
1. How Is Microsporogenesis Different from Megasporogenesis? Name The Cell Division Taking Place in This Process? Which Structure Is Formed in the End Asked in MP Board (MPBSE) Class 12 Biology
Microsporogenesis | Megasporogenesis |
This process led to the formation of haploid microspores from diploid microspore | This process led to the formation of haploid megaspores from diploid megaspore |
Their arrangement is in tetrahedral structure | Arrangement of newly formed megaspores is in linear tetrahedral structure |
All four microspores formed from one mother microspore are functional | One megaspore is functional remaining three are degenerates |
Cell division taking place is Meiosis.
At the end of microsporogenesis, microspores (pollen grain) are formed and female gametophytes (embryo sac) are formed at the end of megasporogenesis.
2. What Were the Advantages of Using Pea Plants in the Experiment by Mendel Study Material Available at Vedantu?
Advantages of using pea plants are as follows:
1. Tracking the passing of Contracting characters in progeny was visible for texture, plant height, flower color, etc.
2. Carpel and stamens were in the same flower
3. Flower was closed
4. In one generation, several offspring were produced
5. Pea plant has a short lifespan
6. It grows easily
7. Cross pollination is easily manipulated
3. How Are Homologous and Analogous Organs Different? Mention Two Examples of Each.
Homologous organ | Analogous organ |
Organs performing different functions but have similar origin and structure | Organs performing similar functions but have different origin and structure |
Organisms bearing these organs are evolutionary related | Organisms bearing these organs are evolutionary not related |
Outlook of these organs is different | The outlook of these organs is similar |
Internal structure of these organs is same | The internal structure of these organs does not show any similarity |
For example, human hands, front limbs of frog and horse | For example, wings of different birds and insects, pattern of skin on zebra and tiger |
4. Define Eugenics and Mention Its Importance in MP Board (MPBSE) Class 12 Biology Question Paper
The branch of biology that deals with the study of improving the human race is known as eugenics. It is also a set of beliefs and practices aimed at improving the genetic quality of the human race.
Importance:
a. Selective reproduction is developed in the same species
b. Genetic materials are transferred among various organisms
c. GM food and GM crops are developed
d. Gene cloning and gene therapy are possible
5. Define Visible Spectrum? How Do UV Rays Affect Living Organisms?
A portion of the electromagnetic spectrum visible to the human eye is known as the visible spectrum. Visible electromagnetic radiation is known as visible light or light and the range of this light is between 390 nm and 760 nm wavelength.
Some effects of UV rays on living organisms are as follows:
a. Eyes are damaged
b. Protein synthesis in the body is affected due to abnormality of DNA
c. Can cause diseases like skin cancer
d. Reduces the power of the immune system of the body
e. Reason of premature aging and sunburn
f. Respiratory system is affected due to the formation of smog
Students can download MP Board (MPBSE) Class 12 Biology Previous Year Question Paper 2018 in PDF format with Solutions by visiting Vedantu’s official website or downloading Vedantu app.