NAME THE TYPE OF FLOWER WHICH FAVOURS CROSS POLLINATION.

NAME THE TYPE OF FLOWER WHICH FAVOURS CROSS POLLINATION.
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1 Answer

Answer :

ANS. CHASMOGAMOUS.
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Related questions

(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.

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Last Answer : ANS. OOGENESIS : DIAGRAMMATIC REPRESENTATION AS GIVEN IN NCERT. DIFFERENCES BETWEEN : OOGENESIS SPERMATOGENESIS (i) STARTS DURING FOETAL LIFE (i) STARTS DURING PUBERTY (ii)PRODUCTS: OVUM (ii) SPERMS

(a) IN WHICH PART OF HUMAN FEMALE REPRODUCTIVE SYSTEM DO THE FOLLOWING EVENTS TAKE PLACE. (i) RELEASE OF FIRST POLAR BODY (ii) RELEASE OF SECOND POLAR BODY (iii) FERTILISATION (iv) IMPLANTATION (b) NAME TWO HORMONES SECREATED ONLY DURING PREGNANCY.

Description : (a) IN WHICH PART OF HUMAN FEMALE REPRODUCTIVE SYSTEM DO THE FOLLOWING EVENTS TAKE PLACE. (i) RELEASE OF FIRST POLAR BODY (ii) RELEASE OF SECOND POLAR BODY (iii) FERTILISATION (iv) IMPLANTATION (b) NAME TWO HORMONES SECREATED ONLY DURING PREGNANCY.

Last Answer : ANS (a) (i) OVARY (ii) FALLOPIAN TUBE (iii) AMPULLA-ISTHAMUS JUNCTION OF FALLOPIAN TUBE (iv) ENDOMETRIUM LINING OF UTERUS (b) HUMAN CHORIONIC GONADOTROPIN AND HUMAN PLACENTAL LACTOGEN

WHAT IS APOMIXIS? DESCRIBE ITS IMPORTANCE?

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Last Answer : ANS. IT IS THE PROCESS OF DEVELOPMENT OF SEEDS WITHOUT FERTILISATION. EXAMPLE: SOME SPECIES OF ASTERACEAE AND GRASSES. IMPORTANCE: APOMICTIC GENES CAN BE INTRDUED IN HYBRID SEED INDUSTRY.

DESCRIBE THE CONTRACEPTIVE ACTIONS OF IUDs.

Description : DESCRIBE THE CONTRACEPTIVE ACTIONS OF IUDs.

Last Answer : ANS. (i) INCREASES PHAGOCYTOSIS OF SPERMS (ii) SUPPRESS SPERM MOTILITY (iii) SUPPRESS FERTILISING CAPACITY OF SPERMS (iv) MAKES CERVIX HOSTILE TO SPERMS.

DIFFERENTIATE BETWEEN MORULA AND BLASTULA STAGES OF MAMMALIAN EMBRYO.

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WHAT IS CORPUS LUTEUM ? UNDER WHAT CONDITIONS DOES IT UNDERGO DEGENERATION ?

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Last Answer : ANS. THE CORPUS LUTEUM IS FORMED IN THE MAMMALIAN OVARY FROM RUPTURED GRAAFIAN FOLLICLE AFTER OVULATION. IT DEGENERATES IN THE ABSENCE OF FERTILISATION, AS THE LEVEL OF FSH AND LH DROPS.

WRITE THE FUNTION OF EACH OF THE FOLLOWING: (a) MIDDLE PIECE OF HUMAN SPERM (b) LUTEINIZING HORMONE IN HUMAN MALES

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STATE ONE ADVANTAGE AND ONE DISADVANTAGE OF CLEISTOGAMY.

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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)

WHEN DO THE OOGENESIS AND THE SPERMATOGENESIS INITIATE IN HUMAN FEMALES AND MALES RESPECTIVELY ?

Description : WHEN DO THE OOGENESIS AND THE SPERMATOGENESIS INITIATE IN HUMAN FEMALES AND MALES RESPECTIVELY ?

Last Answer : ANS. OOGENESIS AT THE FOETAL LIFEAND SPERMATOGENISIS STARTS AT PUBERTY.

WRITE THE LOCATION AND FUNCTION OF SERTOLI CELLS IN HUMANS.

Description : WRITE THE LOCATION AND FUNCTION OF SERTOLI CELLS IN HUMANS.

Last Answer : ANS. IN THE SEMINIFEROUS TUBULES OF TESTIS, NOURISHES DEVELOPING SPERMS.

AT WHAT STAGE IS THE MAMMALIAN EMBRYO IMPLANTED IN THE UTERUS ?

Description : AT WHAT STAGE IS THE MAMMALIAN EMBRYO IMPLANTED IN THE UTERUS ?

Last Answer : ANS. AT THE BLASTOCYST STAGE.

NAME THE PROTECTIVE SUBSTANCE PRESENT IN THE POLLEN ENVELOPE TO TIDE OVER ADVERSE CONDITIONS.

Description : NAME THE PROTECTIVE SUBSTANCE PRESENT IN THE POLLEN ENVELOPE TO TIDE OVER ADVERSE CONDITIONS.

Last Answer : ANS. SPOROPOLLENIN.

WHAT IS PERISPERM ?

Description : WHAT IS PERISPERM ?

Last Answer : ANS. THE RESIDUAL NUCELLUS, WHICH PERSISTS IN THE SEEDS IS CALLED AS PERISPERM.

NAME THE PHENOMENON AND ONE BIRD WHERE THE FEMALE GAMETE DIRECTLY DEVELOPS INTO A NEW ORGANISM.

Description : NAME THE PHENOMENON AND ONE BIRD WHERE THE FEMALE GAMETE DIRECTLY DEVELOPS INTO A NEW ORGANISM.

Last Answer : ANS. PARTHENOGENESIS, TURKEY.

WHY ARE DATE PALMS REFFERED TO AS DIOECIOUS ?

Description : WHY ARE DATE PALMS REFFERED TO AS DIOECIOUS ?

Last Answer : ANS. BECAUSE THEY HAVE UNISEXUAL FLOWERS BORNE ON SEPARATE PLANTS.

WHAT TERM IS GIVEN BY YOU TO THE GROUP OF INDIVIDUALS WHICH ARE GENETICALLY AND MORPHOLOGICALLY IDENTICAL ?

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Last Answer : ANS. CLONE

What is the pollination of the flower head of a tree which is like glue and feathers ?

Description : What is the pollination of the flower head of a tree which is like glue and feathers ?

Last Answer : The pollination of the flower head of the tree is like glue and feathers.

$ Flower of Rafflesia is largest sized. ! Large flowers have wind pollination

Description : $ Flower of Rafflesia is largest sized. ! Large flowers have wind pollination

Last Answer : $ Flower of Rafflesia is largest sized. ! Large flowers have wind pollination A. If both As and R are ... is wrong D. If both As and R are wrong.

$ 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.

Pollination and fertilization occurs before opening of flower is termed as

Description : Pollination and fertilization occurs before opening of flower is termed as

Last Answer : Ans. Cleistogamy

How does the odor of flower petals help pollination ?

Description : How does the odor of flower petals help pollination ?

Last Answer : The purpose of the perfume is to attract a pollinator - insect, bat, bird or whatever. The reward for the pollinator is a meal of nectar, which is produced by the flower.

Consider the following statements about pollination. 1. Transfer of pollen grains from the anther to ovules in the same flower or a different f lower is called pollination. 2. The pollination by wind is called anemophily. 3. Pollination is a prerequisite for seed and fruit development in all flowering plants. 4. Seeds may develop in some water ferns without pollination. Which of the above statement/s is/are correct? (a) 1 and 3 (b) 1, 2 and 4 (c) Only 2 (d) 1, 2, 3 and 4

Description : Consider the following statements about pollination. 1. Transfer of pollen grains from the anther to ovules in the same flower or a different f lower is called pollination. 2. The pollination by wind is called anemophily. 3. Pollination is a ... 1 and 3 (b) 1, 2 and 4 (c) Only 2 (d) 1, 2, 3 and 4

Last Answer : Ans:(c)

An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called (a) pseudopollination (b) pseudoparthenocarpy (c) mimicry (d) pseudocopulation.

Description : An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female species and tries ... phenomenon is called (a) pseudopollination (b) pseudoparthenocarpy (c) mimicry (d) pseudocopulation.

Last Answer : (d) pseudocopulation.

Major cause of mango fruit drop is ___ A) Lack of pollination B) Low stigmatic receptivity C) Defective perfect flower D) All of the above

Description : Major cause of mango fruit drop is ___ A) Lack of pollination B) Low stigmatic receptivity C) Defective perfect flower D) All of the above

Last Answer : D) All of the above

First and the heaviest flower drop in fruit plants occurs due to : a. Structural defects in the flowers b. Lack of pollination c. Non fertilization d. All of the abov

Description : First and the heaviest flower drop in fruit plants occurs due to : a. Structural defects in the flowers b. Lack of pollination c. Non fertilization d. All of the abov

Last Answer : All of the abov

Completion of pollination and fertilization in unopened flower bud is termed as a. Chasmogamy b. Apogamy c. Cleistogamy d. Dichogamy

Description : Completion of pollination and fertilization in unopened flower bud is termed as a. Chasmogamy b. Apogamy c. Cleistogamy d. Dichogamy

Last Answer : Cleistogamy

When pollen of a flower is transferred to the stigma of another flower of the same plant, the pollination is referred to as (a) autogamy (b) geitonogamy (c) xenogamy (d) allogamy.

Description : When pollen of a flower is transferred to the stigma of another flower of the same plant, the pollination is referred to as (a) autogamy (b) geitonogamy (c) xenogamy (d) allogamy.

Last Answer : b) geitonogamy

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) Some reptiles have also been reported as pollinators in some plant species. (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. (d) Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.

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.

The condition in which flower opens only after pollination is called — a. Chasmogamy b. Cleistogamy c. Autogamy d. None of these

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Cross pollination is essential in following type of vegetables. a. Monoecious b. Dioecious c. Gynoecious d. Perigynous

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Last Answer : Dioeciou

Which pluse is having often cross pollination type made of pollination. a. Pea b. Bengal Gramc. Pigeon Pead. Low Pea

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Do you owe favours or others owe you ?

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Potato crop favours the soil for best growth

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Identify the wrong statement with reference to transport of oxygen. (a) Binding of oxygen with haemoglobin is mainly related to partial pressure of O2. (b) Partial pressure of CO2 can interfere with O2 binding with haemoglobin. (c) Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin. (d) Low pCO2 in alveoli favours the formation of oxyhaemoglobin.

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High temperature in gasification of coal favours (A) High production of CO2 (B) Low production of CO2 (C) High production of CO (D) Both (B) and (C

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Which of the following is the most correct statement about the relation between marital status and the personal social adjustment of teachers? Options: A) Empirical evidence favours the married teacher B) Empirical evidence favours the single teacher C) Marital status favour married male teachers but single female teachers D) Marital status bears no relation to adjustment

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Does cross pollination between citrus trees occur?

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

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

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Difference between self and cross pollination? -Biology

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