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151.	The 2 lobes of the anther are attached together by a sterile _______ tissue.(a) spongy(b) parenchymatous(c) schlerenchyma(d) pedicelI got this question by my college director while I was bunking the class.The doubt is from Flowering Plants Reproduction topic in section Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» Right choice is (b) parenchymatous The best explanation: The 2 LOBES are separated by a deep groove in the anterior region and are attached TOGETHER on the BACKSIDE by a STERILE parenchymatous tissue called connective. This connective is absent in monothecous anthers.

152.	In Malvaceae anthers are _________(a) dithecous(b) trithecous(c) polythecous(d) monothecousThe question was posed to me in a job interview.This interesting question is from Flowering Plants Reproduction topic in division Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» Right option is (d) MONOTHECOUS The explanation is: ANTHERS may contain 1 or 2 lobes. Anthers with ONE LOBE are known as monothecous and anthers with 2 lobes are known as dithecous. In MALVACEAE and Euphorbiaceae, the anthers are monothecous.

153.	Stamens are the male reproductive structures.(a) True(b) FalseThis question was addressed to me during an interview.I need to ask this question from Flowering Plants Reproduction topic in division Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» Correct choice is (a) True For explanation: Stamens are the male reproductive structures that consist of ANTHERS and filaments. The anthers are FUSED with the filaments. The anthers carry the male gametes inside the POLLEN GRAINS.

154.	What is androecium?(a) Stamens(b) Carpels(c) Corolla(d) SepalsThis question was addressed to me during an internship interview.My doubt stems from Flowering Plants Reproduction topic in section Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» CORRECT answer is (a) Stamens The explanation: ANDROECIUM is a collection of stamens. Stamens CONSISTS of anthers and filaments. Anthers are fused to the top of the FILAMENT that acts like a stalk. Pollen SACS are present on the anthers, within which are the pollen grains.

155.	Cross pollination offers variation.(a) True(b) FalseThis question was posed to me by my school teacher while I was bunking the class.Question is taken from Sexual Reproduction in Flowering Plants in section Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» The correct choice is (a) True The explanation: Cross pollination is usually carried out by insects and animals or the environment. When insects land on the flower, the sticky pollen grains that CARRY the male gamete attach themselves to the insect body. When the same insect goes and LANDS on another flower, the pollen grains land on the stigma. This is cross pollination. Since fertilization is happening between male and FEMALE gametes of different flower, variation is SEEN which helps in adapting itself to the changing weather conditions.

156.	Anthers and filaments form the _____(a) gynoecium(b) calyx(c) androecium(d) corollaThis question was posed to me during an interview for a job.The origin of the question is Sexual Reproduction in Flowering Plants in chapter Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» Right option is (c) androecium The explanation is: Androecium consists of the ANTHERS and FILAMENTS. They are the male reproductive structures. Male GAMETES that are in pollen grains are on the anthers. Depending on the SPECIES, the stamens (anthers and filaments) may or may not protrude out of the flower.

157.	What does the androecium produce?(a) Spores(b) Microspores(c) Egg(d) OvulesI have been asked this question in my homework.My doubt stems from Sexual Reproduction in Flowering Plants topic in division Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» The correct choice is (b) MICROSPORES The explanation: ANDROECIUM collectively consists of the stamens, that is anthers and FILAMENTS. Anthers consists of the POLLEN grains. It’s within the pollen grains that the microspores are present. They FORM the male gamete.

158.	What is self-pollination?(a) Pollens of a flower falling on another flower(b) Pollens of a flower falling on the stigma of the same flower(c) Pollens of the flower falling of the stigma of another flower of the same plant(d) Pollens of a flower falling on any flowerI have been asked this question in unit test.I'd like to ask this question from Sexual Reproduction in Flowering Plants topic in division Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» RIGHT option is (B) Pollens of a flower falling on the stigma of the same flower To explain I WOULD say: Self-pollination means fertilization by pollens of the same flower. When the pollens from the anther fall on the stigma of the same flower, the style carries the pollen to the OVARIES. This is known as self-pollination.

159.	What is a collection of sepals?(a) Calyx(b) Corolla(c) Petals(d) StyleThis question was posed to me in class test.This question is from Sexual Reproduction in Flowering Plants in portion Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» RIGHT choice is (a) Calyx To explain I would say: Collection of sepals is known as calyx. FLORAL PARTS like calyx and various other parts help in the dispersal of fruits and seeds. Corolla is also known as petals. Style is a part of the gynoecium that helps in POLLINATION.

160.	Why are petals unique in shape, odor, color, etc.?(a) Attraction(b) Pollination(c) Survival(d) ProtectionThis question was addressed to me during an online interview.This intriguing question comes from Sexual Reproduction in Flowering Plants in portion Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» The correct ANSWER is (b) Pollination Easiest EXPLANATION: Flowers are unique in color, shape, odor, etc. for pollination. It is necessary to attract INSECTS and animals for CROSS pollination and having sweet odor and attractive shapes and colors helps in attracting them. Pollination is a pre-requisite for FERTILIZATION.

161.	Fruits and seeds are formed before fertilization.(a) True(b) FalseThe question was posed to me by my school principal while I was bunking the class.This key question is from Sexual Reproduction in Flowering Plants in portion Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» CORRECT option is (b) False Explanation: FRUITS and seeds are formed after fertilization. When the pollen grains fall on the stigma of the flower, fertilization PROCESS begins. When fertilization takes place, ovaries and ovules form PARTS of a fruit while the rest of the parts wither and fall off.

162.	What are the four whorls of the flower arranged on?(a) Ovaries(b) Stem(c) Petals(d) ThalamusThis question was addressed to me in semester exam.I would like to ask this question from Sexual Reproduction in Flowering Plants in chapter Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» RIGHT option is (d) Thalamus Explanation: The four whorls of the flower are ARRANGED successively on a swollen END of a stalk or pedicel known as the thalamus or the RECEPTACLE. The receptacle gives rise to edible PARTS of the fruit.

163.	What is the reproductive unit in angiosperms?(a) Flowers(b) Stalk(c) Pedicel(d) LeafI have been asked this question in an online quiz.This is a very interesting question from Sexual Reproduction in Flowering Plants in portion Sexual Reproduction in Flowering Plants of Biology – Class 12
Answer» Correct option is (a) Flowers Best explanation: Flowers are the REPRODUCTIVE units of angiosperms. Angiosperms are FLOWERING plants. Its inside the flowers that the male and female reproductive structures exist. STAMENS in CASE of males and pistil in case of females.

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