Description : In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains? (a) 75 (b) 100 (c) 25 (d) 50
Last Answer : (c) 25
Description : In grasses what happens in microspore mother cell for the formation of mature pollen grains? (a) One meiotic and two mitotic divisions (b) One meiotic and one mitotic divisions (c) One meiotic division (d) One mitotic division
Last Answer : (b) One meiotic and one mitotic divisions
Description : 1. How many meiotic divisions are required to produce 200 microspores from functional microspore mother cell ? a) 400 b) 50 c) 200 d) 100
Last Answer : b) 50
Description : What is a microspore mother cell? -Biology
Last Answer : answer:
Description : Where is the microspore mother cell located? -Biology
Description : In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores
Last Answer : Ans. ((d))
Description : Male gametophyte of angiosperms is shed at (a) four celled pollen grain (b) three celled pollen grain (c) microspore mother cell (d) anther.
Last Answer : b) three celled pollen grain
Description : Which one of the following is surrounded by a callose wall? (a) Male gamete (b) Egg (c) Pollen grain (d) Microspore mother cell
Last Answer : (d) Microspore mother cell
Description : Male gametes in angiosperms are formed by the division of (a) generative cell (b) vegetative cell (c) microspore mother cell (d) microspore.
Last Answer : (a) generative cell
Description : Microsporogenesis is the formation of : a) Microspore b) Megaspore c) Egg d) Embryo sac
Last Answer : Ans : a) Microspore
Description : What does a microspore develop into? -Biology
Description : Difference between microspore and megaspore? -Biology
Description : What are their similarity between Microspore and Megaspore? -Biology
Description : Male gametophyte of angiosperms/monocots is (a) microsporangium (b) nucellus (c) microspore (d) stamen
Last Answer : (c) microspore
Description : Megaspores are produced from the megaspore mother cells after (a) mitotic division (b) formation of thick wall (c) differentiation (d) meiotic division.
Last Answer : d) meiotic division.
Description : With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the ... is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.
Last Answer : Answers-3 Chylomicrons are formed in the gut from exogenous triacylglycerols and cholesterol. They are released into the lymph and thereby enter the blood.They are not formed in the liver.
Description : $ Those plants which produce seeds, without the formation of fruits are called Gymnosperms. ! Endosperm is triploid in Angiospherms
Last Answer : $ Those plants which produce seeds, without the formation of fruits are called Gymnosperms. ! Endosperm is ... D. If both As and R are wrong.
Description : $ Angiosperms produce seeds, but do not produce fruits. ! Fruit and seed formation occurs in Gymnosperms.
Last Answer : $ Angiosperms produce seeds, but do not produce fruits. ! Fruit and seed formation occurs in Gymnosperms. A. ... wrong D. If both As and R are wrong.
Description : 'Cloud burst' means – (1) Sowing of seeds of a crop in cloudy weather. (2) Abnormally heavy downpour of rain, associated with a thunderstorm. (3) Formation of artificial rain. (4) Presence of scattered flakes of cloud in the sky.
Last Answer : (2) Abnormally heavy downpour of rain, associated with a thunderstorm. Explanation: A cloudburst is an extreme amount of precipitation, sometimes accompanied by hail and thunder, that normally ... . However, cloudbursts are infrequent as they occur only via orographic lift or sudden condensation.
Description : Cloud burst means – (1) Formation of artificial rain (2) Abnormally heavy downpour of rain, associated with thunderstorm (3) Presence of scattered flakes of cloud in the sky (4) Sowing of seeds of a crop in a cloudy weather
Last Answer : (2) Abnormally heavy downpour of rain, associated with thunderstorm Explanation: A cloudburst is sudden copious rainfall. It is a sudden aggressive rainstorm falling for a short period of time limited to a small geographical area. Generally cloudbursts are associated with thunderstorms
Description : Conifers differ from grasses in the (a) formation of endosperm before fertilization (b) production of seeds from ovules (c) lack of xylem tracheids (d) absence of pollen tubes.
Last Answer : (a) formation of endosperm before fertilization
Description : ‘Cloud burst’ means (1) Sowing of seeds of a crop in cloudy weather. (2) Abnormally heavy downpour of rain, associated with a thunderstorm. (3) Formation of artificial rain. (4) Presence of scattered flakes of cloud in the sky.
Last Answer : Abnormally heavy downpour of rain, associated with a thunderstorm.
Description : Cloud burst means (1) Formation of artificial rain (2) Abnormally heavy downpour of rain, associated with thunderstorm (3) Presence of scattered flakes of cloud in the sky (4) Sowing of seeds of a crop in a cloudy weather
Last Answer : Abnormally heavy downpour of rain, associated with thunderstorm
Description : Pick out the wrong statement. (A) Swenson-Walker crystalliser is a batch crystalliser (B) Super saturation of the solution is the driving potential for a crystal growth (C) The ... a solution is called mother liquor (D) The first stage of crystal formation is called nucleation
Last Answer : (A) Swenson-Walker crystalliser is a batch crystalliser
Description : An abnormal human baby with ‘XXX’ sex chromosomes was born due to (a) fusion of two ova and one sperm (b) fusion of two sperms and one ovum (c) formation of abnormal sperms in the father (d) formation of abnormal ova in the mother.
Last Answer : (d) formation of abnormal ova in the mother.
Last Answer : Tomato cultivation requires 200 grams of seeds per hectare.
Description : How much tomatoes are required for one kg tomato seeds ? (a) 50 – 300 kg (b) 300 — 350 kg(c) 160 — 210 kg (d) 200 — 250 kg
Last Answer : (c) 160 — 210 kg
Description : Number of meiotic divisions required to produce 200/400 seeds of pea would be (a) 200/400 (b) 400/800 (c) 300/600 (d) 250/500
Last Answer : (d) 250/500.
Description : The average spacing of seeds or hills in field is obtained or determined by a) The ratio of linear or peripheral speed of seed pick up units (cells fingers, etc) to the forward speed of the planter b) The distance ... up units (cells) on the metering unit c) Both (a) and (b) d) None of the above
Last Answer : c) Both (a) and (b)
Description : Weight of 100 seeds
Last Answer : Ans. Seed Index
Description : The weight of 100 seeds of a crop?
Last Answer : Ans.Seed Index
Description : The power cells in your muscles are a genetic gift from your mother only (not your father) - Why was Eve made out of Adam's rib?
Last Answer : God has a sense of humour?
Description : How many offspring cells are formed from three mother cells in mitosis division ?
Last Answer : In mitosis division, 3 offspring cells are formed from three mother cells.
Description : $ Pollination with the help of a pollen tube is called porogamy. ! Pollination occurs before meiosis of pollen mother cells.
Last Answer : $ Pollination with the help of a pollen tube is called porogamy. ! Pollination occurs before meiosis of ... wrong D. If both As and R are wrong.
Description : Transgenic animals may be prepared by introducing a foreign gene into (A) Somatic cells of young animals (B) Testes and ovaries of animals (C) A viral vector and infecting the animals with the viral vector (D) Fertilised egg and implanting the egg into a foster mother
Last Answer : Answer : D
Description : Is there exchange of cells between the mother and the fetus through the placenta ?
Last Answer : Under normal conditions, there is no passage of cells across the placenta during gestation. The placenta has a smooth mucosa separating the richly vascularized region in contact with the mother ... placental barrier forbids the passage of cells. Image Diversity: umbilical cord placental barrier
Description : Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains (a) immunoglobulin A (b) natural killer cells (c) monocytes (d) macrophages.
Last Answer : (a) immunoglobulin A
Description : Which of the following pair have haploid structures? (a) Nucellus and antipodal cells (b) Antipodal cells and egg cell (c) Antipodal cells and megaspore mother cell (d) Nucellus and primary endosperm nucleus
Last Answer : (b) Antipodal cells and egg cell
Description : Which one of the following pairs of plant structures has haploid number of chromosomes? (a) Nucellus and antipodal cells (b) Egg nucleus and secondary nucleus (c) Megaspore mother cell and antipodal cells (d) Egg cell and antipodal cells
Last Answer : d) Egg cell and antipodal cells
Description : In majority of angiosperms, (a) egg has a filiform apparatus (b) there are numerous antipodal cells (c) reduction division occurs in the megaspore mother cells (d) a small central cell is present in that embryo sac.
Last Answer : (c) reduction division occurs in the megaspore mother cells