Generative cell was destroyed by laser but a normal
pollen tube was still formed because
(a) vegetative cell is not damaged
(b) contents of killed generative cell stimulate
pollen growth
(c) laser beam stimulates growth of pollen tube
(d) the region of emergence of pollen tube is not
harmed.

1 Answer

Answer :

(a) vegetative cell is not damaged

Related questions

Description : Function of filiform apparatus is to (a) recognise the suitable pollen at stigma (b) stimulate division of generative cell (c) produce nectar (d) guide the entry of pollen tube.

Last Answer : (d) guide the entry of pollen tube.

Description : Which one of the following statements is wrong? (a) When pollen is shed at two-celled stage, double fertilisation does not take place. (b) Vegetative cell is larger than generative cell. (c) Pollen grains in some plants remain viable for months. (d) Intine is made up of cellulose and pectin.

Last Answer : (a) When pollen is shed at two-celled stage, double fertilisation does not take place.

Description : Which one of the following statements is wrong?a)Pollen grains in some plants remain viable for monthsb)Intine is made up of cellulose and pectinc)When pollen is shed at two-celled state, double fertilization does not take placed)Vegetative cell is larger than generative cell

Last Answer : c)When pollen is shed at two-celled state, double fertilization does not take place

Description : Function of filiform apparatus is toa)Guide the entry of pollen tubeb)Recognize the suitable pollen at stigmac)Stimulate division of generative celld)Produce nectar

Last Answer : )Guide the entry of pollen tube

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 : Pruning in old fruit trees increases fruit bud formation by increasing ______: a. Carbohydrates b. New vegetative growth c. Hormonal contents d. Cell sap

Last Answer : New vegetative growth

Description : What is the function of germ pore? (a) Emergence of radicle (b) Absorption of water for seed germination (c) Initiation of pollen tube (d) Release of male gametes

Last Answer : (c) Initiation of pollen tube

Description : Factors which stimulate pollen tube germination. -Biology

Last Answer : answer:

Description : Which of the following types of cells have a latent ability to regenerate? a) Stable Stable cells have a latent ability to regenerate if they are damaged or destroyed and are found in the ... a type of labile cell that multiply constantly to replace cells worn out by normal physiologic processes.

Last Answer : a) Stable Stable cells have a latent ability to regenerate if they are damaged or destroyed and are found in the kidney, liver, and pancreas, among other body organs.

Description : What stimulates the pollen tube to grow? -Biology

Last Answer : answer:

Description : How to get rid off the fear of being killed or harmed i live in a bad neighbor there known as drug dealers they killed a cop before yet now they been staring at me when ever i walk they keep gossiping i ignore them but this make me scared?

Last Answer : fearing electrical wire

Description : Which is an example of negative feedback? A) Nursing action stimulates the hypothalamus to release oxytocin that triggers mammary gland milk production. B) When the blood becomes dilute, ADH ... produce sperm or eggs. E) TRH stimulates the anterior pituitary to release thyroid-stimulating hormone.

Last Answer : B) When the blood becomes dilute, ADH is no longer released from the hypothalamus

Description : A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when (a) the sporozoites released from RBCs are being rapidly killed and broken down ... to enter fresh RBCs (d) the microgametocytes and megagametocytes are being destroyed by the WBCs

Last Answer : (c) the parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs

Description : How many times could you have easily been badly harmed or killed as a teen doing something dangerous?

Last Answer : Too many things to list or remember – starting with hitch hiking, drinking and driving, walking through woods and bad neighborhoods at night, the list goes on and on.

Description : In gymnosperms, the pollen chamber represents (a) a cavity in the ovule in which pollen grains are stored after pollination (b) an opening in the megagametophyte through which the pollen tube approaches the ... pollen grains develop (d) a cell in the pollen grain in which the sperms are formed.

Last Answer : (c) the microsporangium in which pollen grains develop

Description : 3What is the function of germ pore?a)Initiation of pollen tubeb)Release of male gametesc)Emergence of radicled)Absorption of water for seed germination

Last Answer : a)Initiation of pollen tube

Description : The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason -for this phenomenon? [CSAT 2011] (a) It has a high rainfall that supports ... Exotic and invasive species have not been introduced in this region (d) It has less human interference

Last Answer : Ans: (b)

Description : Which of the following statements is not correct? (a) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil. (b) ... Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.

Last Answer : (c) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

Description : Why is the growth of a pollen tube important? -Biology

Last Answer : answer:

Description : Why is the growth of a pollen tube important? -Biology

Last Answer : answer:

Description : Growth of pollen tube. -Biology

Last Answer : answer:

Description : Why is the growth of a pollen tube important? -Biology

Last Answer : answer:

Description : Growth of pollen tube. -Biology

Last Answer : answer:

Description : Why is the growth of a pollen tube important? -Biology

Last Answer : answer:

Description : In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.

Last Answer : (a) cellular totipotency

Description : What will happen if one part of the ecosystem is damaged or destroyed?

Last Answer : Need answer

Description : A pheromone is A) an endorphin released within the anterior pituitary. B) a growth factor related to the production of tumors. C) a product of a neurosecretory cell that acts on ... ) a regulatory hormone that stimulates or inhibits the release of hormones produced by other endocrine glands.

Last Answer : D) a chemical released by one animal to affect the behavior of another animal.

Description : A student coming out cell fractionation of a tissue and forgot to label his tubes. The contents of one tube when studied showed organelles bounded by

Last Answer : A student coming out cell fractionation of a tissue and forgot to label his tubes. The contents of ... . SER B. Chloroplast C. Lysosome D. Perosisome

Description : What is the name of the big cell in the pollen tube ?

Last Answer : The large cell in the pollen tube is the duct cell

Description : In angiosperms, pollen tube liberate their male gametes into the (a) central cell (b) antipodal cells (c) egg cell (d) synergids.

Last Answer : d) synergids.

Description : Through which cell of the embryo sac, does the pollen tube enter the embryo sac? (a) Egg cell (b) Persistant synergid (c) Degenerated synergids (d) Central cell

Last Answer : c) Degenerated synergids

Description : Factors responsible for creating conditions for emergence and growth of monopoly are A.Control over strategic raw materials B.Patents C.Licensing D.All of the above

Last Answer : D.All of the above Answer Report Dis

Description : The growth of seedling plants after transplantation will not always be proper because (a) New soil may not contain the required minerals (b) During transplantation root hairs get damaged (c) Roots cannot penetrate deep into the soil (d) Of all factors stated above

Last Answer : Ans:(d)

Description : What does the generative cell produce? -Biology

Last Answer : answer:

Description : What is a generative cell? -Biology

Last Answer : answer:

Description : Function of generative cell. -Biology

Last Answer : answer:

Description : What is a generative cell? -Biology

Last Answer : answer:

Description : What does the generative cell produce? -Biology

Last Answer : answer:

Description : Function of generative cell. -Biology

Last Answer : answer:

Description : What is a generative cell ?

Last Answer : : The nucleus or nucleus of pollen is divided into mitotic system. In this division a large cell and a small cell are formed. The large cell is called the tube cell and the small cell is called the generative cell .

Description : Filiform apparatus is characteristic feature of (a) aleurone cell (b) synergids (c) generative cell (d) nucellar embryo.

Last Answer : (b) synergids

Description : Cybertrails are advantageous because: a. They are not connected to the physical world. b. Nobody can be harmed by crime on the Internet. c. They are easy to follow. d. Offenders who are unaware of them leave behind more clues than they otherwise would have

Last Answer : d. Offenders who are unaware of them leave behind more clues than they otherwise would have

Description : 9. Cybertrails are advantageous because: a. They are not connected to the physical world. b. Nobody can be harmed by crime on the Internet. c. They are easy to follow. d. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Last Answer : d. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Description : Cybertrails are advantageous because: a. They are not connected to the physical world. b. Nobody can be harmed by crime on the Internet. c. They are easy to follow. d. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Last Answer : d. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Description : Cyber trails are advantageous because: A. They are not connected to the physical world. B. Nobody can be harmed by crime on the Internet. C. They are easy to follow. D. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Last Answer : D. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Description : Cybertrails are advantageous because: a. They are not connected to the physical world. b. Nobody can be harmed by crime on the Internet. c. They are easy to follow. d. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Last Answer : d. Offenders who are unaware of them leave behind more clues than they otherwise would have.

Description : Estrogen and progesterone control and stimulate the growth of – (1) pituatary gland (2) thyroid gland (3) mammary gland (4) supra renal gland

Last Answer : (3) mammary gland Explanation: Mammary glands are one of the Character of mammalian. Both estrogen and progesterone control growth of mammary gland.

Description : Estrogen and Progesterone control and stimulate the growth in: (1) Pituitary Gland (2) Thyroid Gland (3) Mammary Gland (4) Supra Renal Gland

Last Answer : (3) Mammary Gland Explanation: The female reproductive hormones, estrogens, progesterone, and prolactin, have a major impact on breast cancer and control postnatal mammary gland development. Optimal mammary growth requires both estrogen and progesterone.