Differentiate between ‘self-pollination’ and ‘cross-pollination’. Describe double fertilisation in plants. -Science

Differentiate between ‘self-pollination’ and ‘cross-pollination’. Describe double fertilisation in plants. -Science
by

1 Answer

Answer :

answer:
by

Related questions

How is the process of pollination different from fertilisation ? -Biology

Description : How is the process of pollination different from fertilisation ? -Biology

Last Answer : The process of pollination is simply the transfer of pollen from one flower to other onto the stigma. The process of fertilization is what happens after the pollen is transferred into the ... takes place only in flowering plants whereas, fertilization happens in almost all animals and plants.

Difference between self and cross pollination? -Biology

Description : Difference between self and cross pollination? -Biology

Last Answer : answer:

Difference between self pollination and cross pollination -Biology

Description : Difference between self pollination and cross pollination -Biology

Last Answer : answer:

Why is cross pollination preferable to self pollination? -Biology

Description : Why is cross pollination preferable to self pollination? -Biology

Last Answer : answer:

$ Pollination by insects is called self pollination. ! Cross pollination is between two genetically similar flowers.

Description : $ Pollination by insects is called self pollination. ! Cross pollination is between two genetically similar flowers.

Last Answer : $ Pollination by insects is called self pollination. ! Cross pollination is between two genetically similar flowers ... D. If both As and R are wrong.

A clone is a group of individuals obtained through – (1) Hybridisation (2) Micropropagation (3) Cross pollination (4) Self pollination

Description : A clone is a group of individuals obtained through – (1) Hybridisation (2) Micropropagation (3) Cross pollination (4) Self pollination

Last Answer : (2) Micropropagation Explanation: Micropropagation is the practice of rapidly multiplying stock plant material to produce a large number of progeny plants, using modern plant tissue cultore ... to accelerated growth compared to similar plants produced by conventional methods - like cuttings.

Nature of pollination in cucurbits is: a. Highly cross pollinated b. Oftenly cross pollinated c. Highly self pollinated d. None of above

Description : Nature of pollination in cucurbits is: a. Highly cross pollinated b. Oftenly cross pollinated c. Highly self pollinated d. None of above

Last Answer : Highly cross pollinated

Nature of pollination in cucurbits is: a. Highly cross pollinated b. Oftenly cross pollinated c. Highly self pollinated d. None of above

Description : Nature of pollination in cucurbits is: a. Highly cross pollinated b. Oftenly cross pollinated c. Highly self pollinated d. None of above

Last Answer : Highly cross pollinated

A clone is a group of individuals obtained through (1) Hybridisation (2) Micropropagation (3) Cross pollination (4) Self pollination

Description : A clone is a group of individuals obtained through (1) Hybridisation (2) Micropropagation (3) Cross pollination (4) Self pollination

Last Answer : Micropropagation

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.

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.

Sex is determined in human beings (a) by ovum (b) at time of fertilisation (c) 40 days after fertilisation (d) seventh to eight week when genitals differentiate in fetus.

Description : Sex is determined in human beings (a) by ovum (b) at time of fertilisation (c) 40 days after fertilisation (d) seventh to eight week when genitals differentiate in fetus.

Last Answer : (b) at time of fertilisation

Name the type of pollination in self-incompatible plants. -Biology

Description : Name the type of pollination in self-incompatible plants. -Biology

Last Answer : answer:

What is self pollination in plants? -Biology

Description : What is self pollination in plants? -Biology

Last Answer : answer:

(A) MENTION ANY FOUR STRATEGIES ADOPTED BY FLOWERING PLANTS TO PREVENT SELF-POLLINATION. (B) DEFINE THE TERM EMASCULATION.

Description : (A) MENTION ANY FOUR STRATEGIES ADOPTED BY FLOWERING PLANTS TO PREVENT SELF-POLLINATION. (B) DEFINE THE TERM EMASCULATION.

Last Answer : ANS.(a) (i) SELF INCOMPATIBILITY (ii) PRODUCTION OF UNICELLULAR FLOWERS (iii) ANTHERS AND STIGMA ARE PLACED AT DIFFERENT POSITIONS. (iv) MATURATION OF ANTHER AND STIGMA IS NOT ... EMASCULATION: REMOVAL OF ANTHER BEFORE MATURITY SO AS TO ENSURE CROSS POLLINATION IN SELF POLLINATING FLOWERS.

Does a single pumpkin plant produce fruit or do you need two plants for cross pollination?

Description : Does a single pumpkin plant produce fruit or do you need two plants for cross pollination?

Last Answer : Yes, pumpkins require two plant to cross pollinate each other.

What is cross pollination in plants? -Biology

Description : What is cross pollination in plants? -Biology

Last Answer : answer:

A true breeding plant is (a) one that is able to breed on its own (b) produced due to cross-pollination among unrelated plants (c) near homozygous and produces offspring of its own kind (d) always homozygous recessive in its genetic constitution.

Description : A true breeding plant is (a) one that is able to breed on its own (b) produced due to cross-pollination among unrelated plants (c) near homozygous and produces offspring of its own kind (d) always homozygous recessive in its genetic constitution.

Last Answer : c) near homozygous and produces offspring of its own kind

Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination.

Description : Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination.

Last Answer : c. the inheritance of traits.

Differentiate between the following. a) Hypoglycemia and hyperglycemia b) Epidemic and endemic c) Herbivores and carnivores d) Photosynthesis and respiration e) Pollination and fertilization

Description : Differentiate between the following. a) Hypoglycemia and hyperglycemia b) Epidemic and endemic c) Herbivores and carnivores d) Photosynthesis and respiration e) Pollination and fertilization

Last Answer : a) Hypoglycemia and Hyperglycemia: Hypoglycemia:the medical condition of having an unusually low level of sugar in the blood Hyperglycemia: the medical condition of having an unusually high level of sugar in ... reproduce sexually-that is, when a male and a female are needed to produce an offspring.

Double fertilisation and triple fusion were discovered by (a) Hofmeister (b) Nawaschin and Guignard (c) Leeuwenhoek (d) Strasburger

Description : Double fertilisation and triple fusion were discovered by (a) Hofmeister (b) Nawaschin and Guignard (c) Leeuwenhoek (d) Strasburger

Last Answer : (b) Nawaschin and Guignard

Double fertilisation is fusion of (a) two eggs (b) two eggs and polar nuclei with pollen nuclei (c) one male gamete with egg and other with synergid (d) one male gamete with egg and other with secondary nucleus.

Description : Double fertilisation is fusion of (a) two eggs (b) two eggs and polar nuclei with pollen nuclei (c) one male gamete with egg and other with synergid (d) one male gamete with egg and other with secondary nucleus.

Last Answer : (d) one male gamete with egg and other with secondary nucleus.

Double fertilisation is characteristic of (a) angiosperms (b) anatropous (c) gymnosperms (d) bryophytes.

Description : Double fertilisation is characteristic of (a) angiosperms (b) anatropous (c) gymnosperms (d) bryophytes.

Last Answer : (a) angiosperms

The role of double fertilisation in angiosperms is to produce (a) cotyledons (b) endocarp (c) endosperm (d) integuments.

Description : The role of double fertilisation in angiosperms is to produce (a) cotyledons (b) endocarp (c) endosperm (d) integuments.

Last Answer : (c) endosperm

Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.

Description : Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.

Last Answer : (a) two polar nuclei and one male gamete

Double fertilisation is exhibited by (a) algae (b) fungi (c) angiosperms (d) gymnosperms.

Description : Double fertilisation is exhibited by (a) algae (b) fungi (c) angiosperms (d) gymnosperms.

Last Answer : c) angiosperms

Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.

Description : Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.

Last Answer : (d) syngamy and triple fusion.

Which of the following is without exception in angiosperms? (a) Presence of vessels (b) Double fertilisation (c) Secondary growth (d) Autotrophic nutrition

Description : Which of the following is without exception in angiosperms? (a) Presence of vessels (b) Double fertilisation (c) Secondary growth (d) Autotrophic nutrition

Last Answer : (b) Double fertilisation

WHY IS THE PROCESS OF FERTILISATION IN A FLOWERING PLANT REFFERED TO AS DOUBLE FERTILISATION ?

Description : WHY IS THE PROCESS OF FERTILISATION IN A FLOWERING PLANT REFFERED TO AS DOUBLE FERTILISATION ?

Last Answer : ANS. DOUBLE FERTILISATION= SYNGAMY + TRIPLE FUSION SYNGAMY= ONE MALE GAMETE + EGG--- ZYGOTE(n) TRIPLE FUSION= ANOTHER MALE GAMETE+ POLAR NUCLEI-PRIMARY ENOSPERM NUCLEUS(3n)

The example of hermaphrodite animal in which cross fertilisation occurs is?

Description : The example of hermaphrodite animal in which cross fertilisation occurs is?

Last Answer : Earthworm

The example of hermaphrodite animal in which cross fertilisation occurs is (1) Hydra (2) Ascaris (3) Earthworm (4) Silkworm

Description : The example of hermaphrodite animal in which cross fertilisation occurs is (1) Hydra (2) Ascaris (3) Earthworm (4) Silkworm

Last Answer : Hydra

Advantages of self pollination. -Biology

Description : Advantages of self pollination. -Biology

Last Answer : answer:

Disadvantages of self pollination. -Biology

Description : Disadvantages of self pollination. -Biology

Last Answer : answer:

What are the benefits of self-pollination ?

Description : What are the benefits of self-pollination ?

Last Answer : There are several benefits to self-pollination. The advantages are discussed below - self-pollination reduces pollen waste , eliminates the need to rely on carriers for pollination and ensures ... Self-pollination plays an important role in maintaining the characteristic purity of a plant species.

What is self-pollination ?

Description : What is self-pollination ?

Last Answer : Self-pollination is when the pollen spontaneously transfers from the anther into the uterus of the same flower or any other flower of the same plant.

$ Self pollination in bud condition of a flower is called cleistogamy. ! Cleistogamy is usually accompanied by geocarpy.

Description : $ Self pollination in bud condition of a flower is called cleistogamy. ! Cleistogamy is usually accompanied by geocarpy.

Last Answer : $ Self pollination in bud condition of a flower is called cleistogamy. ! Cleistogamy is usually accompanied by ... D. If both As and R are wrong.

A mechanism of self pollination in which flowers open but only after pollination has take place

Description : A mechanism of self pollination in which flowers open but only after pollination has take place

Last Answer : Ans. Chasmogamy

Self pollination will lead to – (1) inbreeding (2) rare breeding (3) overbreeding (4) outbreeding

Description : Self pollination will lead to – (1) inbreeding (2) rare breeding (3) overbreeding (4) outbreeding

Last Answer : (1) inbreeding Explanation: Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.

The pollination of maize takes place by (1) self-pollination (2) pollination by insects (3) pollination by air (4) pollination by rain

Description : The pollination of maize takes place by (1) self-pollination (2) pollination by insects (3) pollination by air (4) pollination by rain

Last Answer : (3) pollination by air Explanation: Maize (called corn in some parts of the world) is pollinated by air. The male anthers let go of their pollen and it blows over to a nearby female flower on ... a corn, rather than both sexes in one flower. Maize flowers have evolved to use air for pollination.

Self pollination is a form of: a. Inbreeding b. Out breeding c. Random mating d. None of these

Description : Self pollination is a form of: a. Inbreeding b. Out breeding c. Random mating d. None of these

Last Answer : Inbreeding

.Angiosperms have dominated the land flora primarily because of their (a) power of adaptability in diverse habitat (b) property of producing large number of seeds (c) nature of self pollination (d) domestication by man

Description : .Angiosperms have dominated the land flora primarily because of their (a) power of adaptability in diverse habitat (b) property of producing large number of seeds (c) nature of self pollination (d) domestication by man

Last Answer : (a) power of adaptability in diverse habitat

Mention three strategies evolved to prevent self-pollination in flowers.

Description : Mention three strategies evolved to prevent self-pollination in flowers.

Last Answer : Ans: 1. Dichogamy: stigma and anther mature at different times. 2. Heterostyly: stigma and anther are placed at different levels. 3. self-incompilibility

Which one of following is true about chloroplast (A) It is underground part (B) It helps in pollination (C) Self replicating organelle (D) Involve in Lipid synthesis

Description : Which one of following is true about chloroplast (A) It is underground part (B) It helps in pollination (C) Self replicating organelle (D) Involve in Lipid synthesis

Last Answer : (C) Self replicating organelle

Self pollination will lead to (1) inbreeding (2) rare breeding (3) overbreeding (4) outbreeding

Description : Self pollination will lead to (1) inbreeding (2) rare breeding (3) overbreeding (4) outbreeding

Last Answer : inbreeding

The pollination of maize takes place by (1) self-pollination (2) pollination by insects (3) pollination by air (4) pollination by rain

Description : The pollination of maize takes place by (1) self-pollination (2) pollination by insects (3) pollination by air (4) pollination by rain

Last Answer : pollination by air

Does cross pollination between citrus trees occur?

Description : Does cross pollination between citrus trees occur?

Last Answer : It can happen, and sometimes actually occur, but such a cross-pollinations are considered freaks of nature, and the pistula of one tree is attuned to the pollen of that particular species. I do not believe that you will have a problem with cross-pollination between the species.

Advantages of cross pollination. -Biology

Description : Advantages of cross pollination. -Biology

Last Answer : answer:

Disadvantages of cross pollination. -Biology

Description : Disadvantages of cross pollination. -Biology

Last Answer : answer:

enlist the steps for controlled cross pollination. would emasculation be needed in cucurbit plant? -Biology

Description : enlist the steps for controlled cross pollination. would emasculation be needed in cucurbit plant? -Biology

Last Answer : answer:

How does cross pollination occur in plant? -Biology

Description : How does cross pollination occur in plant? -Biology

Last Answer : answer:

What are the agents of Cross pollination? -Biology

Description : What are the agents of Cross pollination? -Biology

Last Answer : answer: