Differentiate between Parthenocarpy and Parthenogenesis. Give one example of each.

Criteria Parthenocarpy Parthenogenesis Definition It is the production of fruit from the ovary without fertilization. It is the development of an unfertilized egg into a complete individual without fertilization. Criteria Parthenocarpy Parthenogenesis Occurrence It occurs because of unsuccessful pollination. It occurs only in plants. It occurs in both plants and animals. Criteria Parthenocarpy Parthenogenesis Product It produces seed-less fruits. For example, Banana, pineapple, watermelon, papaya, etc. It gives haploid organisms. For example, Some plants such as Datura, Nicotiana, etc., and animals like drones, Typhlina brahmina, etc.

E M B I B E

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 14

HARD

12th Karnataka Board

IMPORTANT

Earn 100

How many wall layers surround the microsporangium?

Important Questions on Sexual Reproduction in Flowering Plants

MEDIUM

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 15

Pollen grains are used by athletes and racehorses because of their rich nutritional value. Justify.

MEDIUM

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 16

What is the purpose of cryopreservation of pollens?

HARD

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 17

When and where do tapetum and synergids develop in flowering plants? Mention their function.

MEDIUM

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 18

What is bagging technique? How is it useful in a plant breeding programme?

MEDIUM

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 19

The generative cell of two-celled pollen divides in the pollen tube but not in a three-celled pollen. Give reasons.

HARD

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 20

Draw a schematic transverse section of a mature anther of an angiosperm. Label its epidermis, middle layers, tapetum, endothecium, sporogenous tissue and the connective.

HARD

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 21

What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

EASY

12th Karnataka Board

IMPORTANT

Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Sexual Reproduction in Flowering Plants>Exercise>Q 22

Why is apple called a false fruit? Which part(s) of the flower forms the fruit?