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NEET - Grade 12 - Biology - Reproduction in Organisms - Introduction and Snapshot of Reproduction in Organisms - Study ref# 938

Introduction: Each and every organism can live only for a certain period of time. The period from birth to the natural death of an organism represents its life span. Several other organisms are drawn for which you should find out t... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Introduction and Snapshot of Reproduction in Organisms - Study ref# 939

Following sections must be covered to understand the Reproduction in Organisms: 1. Asexual Reproduction 2. Sexual Reproduction... read more

NEET - Grade 12 - Biology - Principles of Inheritance and Variation - Introduction and Snapshot of Principles of inheritance and Variation - Study ref# 950

Introduction: Humans knew from as early as 8000-1000 B.C. that one of the causes of variation was hidden in sexual reproduction. They exploited the variations that were naturally present in the wild populations of plants and animals to... read more

NEET - Grade 11 - Biology - Structural Organisation in Animals - Importance and Snapshot of Structural Organization In Animals - Study ref# 755

Introduction: In unicellular organisms, all functions like digestion, respiration and reproduction are performed by a single cell. In complex body of multicellular animals the same basic functions are carried out by different groups of... read more

NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Importance and Snapshot of Cell Cycle and Cell Division - Study ref# 764

Introduction: Are you aware that all organisms, even the largest, start their life from a single cell? You may wonder how a single cell then goes on to form such large organisms. Growth and reproduction are characteristics of cells, in... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Target Setup for Reproduction in Organisms - Study ref# 940

Student requires to achieve the following milestones to get better grip over Reproduction in Organisms. The milestones / targets are as follows: Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapt... read more

NEET - Grade 11 - Biology - The Living World - Study ref# 3468

Explain the following briefly: “Reproduction cannot be an all-inclusive defining characteristic of living organisms”.“Cellular organization of the body is the defining feature of the life form”. Answer: The explanations are as follows:Ther... read more

NEET - Grade 11 - Biology - Biological Classification - Study ref# 3474

What was the criteria of five Kingdom classifications? Name the Kingdoms and write down three important features of each Kingdom with examples. Answer: The main criteria for classification used by R.H. Whittaker in his five Kingdom classification sys... read more

NEET - Grade 11 - Biology - Cell Cycle and Cell Division - Study ref# 4226

Write down the significance of Mitosis? Answer: Significance of Mitosis:1) Growth: The number of cells within an organism increases by mitosis and this is the basis of growth in multicellular organisms.2) Cell Replacement: Cells are constant... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10088

Identify ‘A’ in the given diagram and state its function. [R] [Delhi set-I, Comptt.2016] Answer: ‘A’—Adventitious buds Function—Vegetative propagation ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10089

Identify ‘A’ in the given diagram and state its function. [R] [Delhi set-I, Comptt.2016] Answer: ‘A’—Offset Function—Vegetative propagation ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10090

Name an alga tat reproduces asexually through zoospores. Why are these reproductive units so called? [A][CBSC, All India, 2013] Answer: Asexual reproduction by zoospore formation takes pl... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10091

Name the units of vegetative propagation in grasses and water hyacinth. [R] [Outside Delhi set-III, Comptt.2012] Answer: Grasses: Runner. Water hyacinth: Offset.... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10092

Name the vegetative propagules in the following:

(i) ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10093

Write the name of the organism that is referred to as the ‘Terror of Bengal’. [U] [Delhi Set-I,2014] Answer: Eichhornia crassipes put “Water hyacinth under bracket removed slash. (water hyacinth). ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10094

Why are living plant cells said to be totipotent? [U] [Outside Delhi Set-III, 2014] Answer: The living plant cells are said to be totipotent because the whole plant can be regenerated from a single cell.... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10095

Name the mode of reproduction that helps in producing genetically identical offsprings. [U] [Delhi set-I, Comptt.2012] Answer: Asexual reproduction.... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10096

Name an organism where cell division in itself is a mode of reproduction. [U] [Outside Delhi set-I, II, Comptt.2013] Answer: Amoeba, a unicellular organism which reproduces asexually by binary fission.... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10097

Which of the following organisms exhibit binary fission? [R] [Outside Delhi set-I, Comptt.2012] Answer: Bacillus, Yeast and Amoeba.... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10098

Why banana is considered a good example of parthenocarpy? [U] [Delhi & Outside Delhi set-I, 2012] Why is banana referred to as a parthenocarpic fruit? [U] [Outside Delhi set-I, Comptt.20... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10099

Banana produces fruits but is propagated only by vegetative means. Why does is it so? [E & A][CBSE Foreign, 2012] Answer: Seeds are not produced in banana. So, they are propagated only by vegetative me... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10100

Name the units of vegetative propagation in water hyacinth. Explain giving reasons why it has become the most invasive aquatic weed? [A][CBSE Foreign, 2013; Delhi set-I, Comptt.2013] Answer: Water hya... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10101

Write the two pre-fertilization events from the list given below: Syngamy, gametogenesis, embryogenesis, pollination. [U] [Delhi set-I, Comptt.2014] Answer: Gametogenesis and pollination.... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10102

In which two of the following organisms is the fertilization external? Bony fishes, ferns, frog, birds. [R] [Delhi set-III, Comptt.2014] Answer: Bony fishes and frogs.... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10103

Name the common phenomenon with reference to reproduction in rotifers, honey bees and turkey. [U] [Delhi set-I, Comptt.2013] Answer: The common phenomenon with reference to reproduction in rotifers, honey ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10104

Name the mode of reproduction that ensures the creation of new variants. [U] [Delhi set-I, Comptt.2012] Answer: Sexual reproduction: it is a kind of reproduction where male and female gametes fuse toget... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10105

Which of the following statements is true for cucurbits?

(i) &n... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10106

Name two animals that exhibit oestrous cycle. [R][Foreign, Set-I, 2016; Delhi set-I, Comptt.2014] Answer: Cow, sheep, rat, deer, dog, tiger, etc. (any two) [CBSE Marking Scheme, 2... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10107

(a) Why do organisms like algae and fungi shift from asexual m... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10108

Explain the significance of meiocytes in a diploid organism. [U] [Delhi set-I, 2016] Answer: Undergo meiosis/undergo gametogenesis/form haploid gametes, help to restore 2n (diplody) through ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10109

Why do algae and fungi shift to sexual made of reproductions just before the onset of adverse conditions? Answer: Most of the algae and fungi are unable to survive under adverse environment conditions. Therefore, in order to tide over these ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10110

Coconut plant is monoicous, while date palm is dioecious. Why are they called so? [U][Delhi set-I,2014] Answer: In coconut plant, both male and female flowers are present on the same plant w... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10111

Angiosperms bearing unisexual flowers are said to be either monoecious or dioecious. Explain with the help of one example each. [A][Delhi set-III,2016] Answer: Monoecious Angiosperms: Plants... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10112

Out of many papaya plants growing in your garden, only a few bear fruits. Give reasons. [U][Outside Delhi set-III,2016] Answer: Unisexual / Dioecious / male and female flowers are borne on separate plants,... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10113

Why is a whiptail lizard referred to as partheno-genetic? [U] [Delhi Set –I,2012] Answer: Whiptail lizard is referred to as parthenogenetic because the embryos of whiptail lizards are developed from egg without ... read more

NEET - Grade 12 - Biology - Reproduction in Organisms - Study ref# 10114

The turkey usually produces females for several Generation. How is this possible? [U][CBSE SQP 2012] Answer: This is possible due to parthenogenesis. In birds like turkey, only the female gam... read more

NEET - Grade 12 - Biology - Organisms and Populations - Study ref# 10385

A moss plant is unable to complete its life cycle in a dry environment. State two reasons. [U][Outside Delhi set-II, 2015] Answer: Mosses cannot complete their life cycle in an environment because of the ... read more

NEET - Grade 12 - Biology - Organisms and Populations - Study ref# 10386

Why do algae and fungi shift to sexual mode of reproduction just before the onset of adverse conditions? [R][ Delhi set-I,II, 2014, 2011] Answer: For survival during unfavorable conditions / fusion of gametes helps to pool the... read more

NEET - Grade 12 - Biology - Organisms and Populations - Study ref# 10404

(i) ... read more