Biology Ch 4 Class 12 Reproduction





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In sexual reproduction, plants have diplohaplontic life cycle with alternating

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Seeds are dormant in conditions of

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Which organ(s) in the male reproductive system produce gametes?

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Which disorder among the following CANNOT be detected by amniocentesis?..

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In the male reproductive tract, sperm cells follow a specific path. Which of the following do sperm cells enter after traveling through the epididymis?

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Treponema pallidum causes:

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Which one is not a day neutral plant?

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Menstrual cycle can be divided into:

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Hydra reproduces asexually by:

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Which characteristic is not of identical twins

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Menstruation, the shedding of the lining of the uterus (endometrium), is accompanied by:

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Testes are structures that produce:

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The sexually transmitted disease, that can affect both the male and the female genitals and may damage the eyes of babies born of infected mothers is:

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Referring to sexual reproduction, humans are:

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The primary oocyte in mammals has which of the following structures around it:

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What is critical in photoperiodism?

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Which of the following is found beneath the prostate gland?

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Female rabbits are:

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In asexual reproduction offspring are produced by

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Development of an egg into zygote without fertilization is called

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A pollen tube serves to:

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In human females, oocytes are held in the second metaphase until ________.

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Duration of menstrual cycle is how many days on average?

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Male and female sea urchins release their sperm and eggs Into the water where fertilization takes place. How can their reproduction be described?

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The human cells affected in HIV are which of the following?

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Follicle – stimulating hormone, which is produced by the pituitary gland, stimulates the ovaries to produce:

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All of the following are sexually transmitted diseases except:

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In biennials and perennials, low temperature stimulus is not received by

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Which method is of asexual reproduction?

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In sexual reproduction, plants have diplohaplontic life cycle with alternating

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In asexual reproduction offspring are produced by which of the following?

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Amniocentesis is performed between the:

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Which of these cycles operate in human females?

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Which of the following is correct in humans?

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Pituitary gland releases ______ hormone and _______ hormone while ovaries produce _______ and progesterone.

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Which of the following is an ovoviviparous animal?

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In which organism males are haploid?

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Which statement is incorrect?

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Fallopian tube in humans is important for:

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Developing seeds are rich source of

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A major constituent of contraceptive pills is:

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Example of ovoviviparous

 

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Viviparous animals are those in which

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Which statement is correct?

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In cloning, nucleus is introduced into

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Which of the following hormones of the pituitary gland regulates the menstrual cycle?

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In which organism males are haploid

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Colour of corpus luteum is:

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What is the commercial method of producing millions of seedlings in limited time?

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Only one ovary is functional at a time in:

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Which one of the following represents the changes that occur in the ovary and the uterus approximately every 28 days involving ovulation with the breakdown and loss of the lining of the uterus?

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Egg-laying mammals are called:

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Gametes in animals are produced by

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In humans, ovaries after birth contain:

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Ovulation is induced by ______ hormone secreted by the pituitary gland.

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In parthenocarpy which levels are high in ovaries

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In which of the following options is mitotic division involved?

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The egg-laying birds are called:

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Luteinizing hormone, which is produced by the pituitary gland, promotes ovulation and stimulate the ovaries to produce:

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Which statement is incorrect?

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During birth, central nervous system of infants can be damaged by

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