12th Grade > Biology
GROWTH & REPRODUCTION IN PLANTS AND ANIMALS MCQs
Plant Growth And Development, Reproduction In Animals, Sexual Reproduction In Flowering Plants
Total Questions : 111
| Page 11 of 12 pages
Answer: Option B. -> False
:
B
In asexual reproduction, fertilisation(fusion of male and female gametes) does not take place. Asexual reproductionis a mode ofreproductionby which offspring arisefrom a single parentand inherits the genes of itsparent.
:
B
In asexual reproduction, fertilisation(fusion of male and female gametes) does not take place. Asexual reproductionis a mode ofreproductionby which offspring arisefrom a single parentand inherits the genes of itsparent.
Answer: Option B. -> zygote
:
B
Fusion of the male and the female gamete, i.e., the sperm and the ovum, is called fertilisation. This results in the formation of a single-celled zygote. After fertilisation,the zygote divides repeatedly to give rise to a ball of cells. Thisball of cells eventually develops into the various types of cells and tissues in an organism.
:
B
Fusion of the male and the female gamete, i.e., the sperm and the ovum, is called fertilisation. This results in the formation of a single-celled zygote. After fertilisation,the zygote divides repeatedly to give rise to a ball of cells. Thisball of cells eventually develops into the various types of cells and tissues in an organism.
Answer: Option B. -> zygote
:
B
Fusion of the male and the female gamete, i.e., the sperm and the ovum, is called fertilisation. This results in the formation of a single-celled zygote. After fertilisation,the zygote divides repeatedly to give rise to a ball of cells. Thisball of cells eventually develops into the various types of cells and tissues in an organism.
:
B
Fusion of the male and the female gamete, i.e., the sperm and the ovum, is called fertilisation. This results in the formation of a single-celled zygote. After fertilisation,the zygote divides repeatedly to give rise to a ball of cells. Thisball of cells eventually develops into the various types of cells and tissues in an organism.
Answer: Option C. -> half of the number in parent cell
:
C
In meiosis, four daughter cells are produced. It is also known as reductional division, since the chromosome number gets halved in the daughter cells. For example, if a parent cell with 46 chromosomes undergoes meiosis then the daughter cells will have 23 chromosomes each. Hence, the meiotic daughter cells are also known as haploid cells or gametes.
:
C
In meiosis, four daughter cells are produced. It is also known as reductional division, since the chromosome number gets halved in the daughter cells. For example, if a parent cell with 46 chromosomes undergoes meiosis then the daughter cells will have 23 chromosomes each. Hence, the meiotic daughter cells are also known as haploid cells or gametes.
Answer: Option B. -> 8 days
:
B
Blastocyst consists of an outer sphere of cells enclosing an inner cell mass that is destined to be the embryo. It gets implanted in the uterine wall in the 8th day after fertilisation.
:
B
Blastocyst consists of an outer sphere of cells enclosing an inner cell mass that is destined to be the embryo. It gets implanted in the uterine wall in the 8th day after fertilisation.
Answer: Option A. -> well developed embryo
:
A
When the sperm fertilises the egg, the single-celled fertilised egg is called the zygote. The zygote undergoes repeated cell divisions to form a stage called the blastocyst. In this stage, there is a sphere of cells which encloses a inner mass of cells. The inner mass of cells develops into anembryo. As the embryo develops, from around the 11th week it is known as a foetus.
:
A
When the sperm fertilises the egg, the single-celled fertilised egg is called the zygote. The zygote undergoes repeated cell divisions to form a stage called the blastocyst. In this stage, there is a sphere of cells which encloses a inner mass of cells. The inner mass of cells develops into anembryo. As the embryo develops, from around the 11th week it is known as a foetus.
Answer: Option A. -> True
:
A
Each sperm is a single haploid cell.Sperm cellscannot divide and have a limited lifespan. After their fusion with eggcells, a new organism develops from thezygote.
:
A
Each sperm is a single haploid cell.Sperm cellscannot divide and have a limited lifespan. After their fusion with eggcells, a new organism develops from thezygote.
Answer: Option A. -> the nucleus divides first and then the cytoplasm
:
A
During cell division, the nucleus divides first and then the cytoplasm. The process of nuclear division is called karyokinesis while the process of cytoplasmic division is called cytokinesis.
:
A
During cell division, the nucleus divides first and then the cytoplasm. The process of nuclear division is called karyokinesis while the process of cytoplasmic division is called cytokinesis.
Answer: Option B. -> False
:
B
In vitro fertilisation is the process by which fertilisation (fusion of the egg and the sperm)takes place outside the body.Doctors collect freshly released egg and sperm and put them together for a few hours in a liquid medium. In case fertilisation occurs, the zygote is allowed to develop for about a week into an embryo and then it is placed in the mother’s uterus. Complete development takes place in the uterus and the baby is born like any other baby. Babies formed through IVF are called test tube babies but they do not develop in a test tube.
:
B
In vitro fertilisation is the process by which fertilisation (fusion of the egg and the sperm)takes place outside the body.Doctors collect freshly released egg and sperm and put them together for a few hours in a liquid medium. In case fertilisation occurs, the zygote is allowed to develop for about a week into an embryo and then it is placed in the mother’s uterus. Complete development takes place in the uterus and the baby is born like any other baby. Babies formed through IVF are called test tube babies but they do not develop in a test tube.
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