Free How Do Organisms Reproduce? 03 Practice Test - 10th Grade
Question 1
Asexual reproduction takes place through budding in:
Amoeba
Yeast
Hydra
Leishmania
SOLUTION
Solution : B and C
Yeast and hydra the organisms which reproduce by the process of budding. Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site. A parent organism creates a bud from its own cells, which then form the basis of the offspring organism and develop into an organism resembling the parent. Amoeba and leishmania undergoes binary fission.
Question 2
Fertilisation is the fusion of sperm and ovum.
True
False
SOLUTION
Solution : A
Human fertilization is the union of a human egg and sperm, usually occurring in the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg. This is an important event of sexual reproduction. The fertilized egg eventually develops to become the offspring.
Question 3
Onset of menstruation is called menopause.
True
False
SOLUTION
Solution : B
Menstruation, also known as a period or monthly, is the regular discharge of blood and inner lining of uterus through the vagina. The first period usually begins between twelve and fifteen years of age, a point in time known as menarche. The onset of menstruation is called menarche while permanent stoppage of menstruation is termed as menopause.
Question 4
Why do organisms reproduce, even though reproduction is not as vital as respiration, excretion etc., at the expense of energy?
It’s a basic instinct which cannot be avoided.
To ensure continuity of their species.
To improve efficiency of other life processes.
To make organisms more vulnerable to natural changes.
SOLUTION
Solution : B
Reproduction, compared to other life processes such as respiration, digestion, circulation etc., is not that vital and essential to maintain life of an organism. Morover, the process of reproduction takes more energy in comparision. Despite that, It is still a crucial process as it ensures continuity of their species in the biosphere.
Question 5
In humans, non-motile and food storing germ cells is ________ and the motile germ cell is _________.
ovule, anther
ovum, sperm
sperm, ovum
ovule, sperm
SOLUTION
Solution : B
The egg cell, or ovum (plural ova), is the female reproductive cell (gamete) in sexually producing organisms. The egg cell is typically not capable of active movement, and it is much larger (visible to the naked eye) than the sperm. The motile germ cell is sperm. The primary function of the sperm is to pass on the necessary biological information required to produce a new organism. This is true for all the organisms which reproduce sexually.
Question 6
Which of the following is not a sexually transmitted disease?
SOLUTION
Solution : B
Visceral leishmaniasis (VL), also known as kala-azar and black fever, is the second-largest parasitic killer in the world. It is a disease transmitted by the sandfly. The other three diseases namely Warts, Syphilis and Gonorrhoea are sexually transmitted diseases(STD).
Question 7
Similar animals with noticeable differences in them are the direct result of ___________ .
SOLUTION
Solution : A and B
Similar animals which we see around us with noticeable differences in them are the result of genetic variation. Sexual reproduction is based on fusion of haploid gametes which in turn is the source of genetic variations at DNA level. These variations produce these noticeable physical and behavioural differences in the animals of the same species.
Question 8
How many pairs of the ovaries and testis are present in human females and males respectively?
One pair of the ovary in females and one pair of the testis in males
Ovaries and testis do not occur in pairs
Two pairs of the ovary in females and one pair of the testis in males
Two pairs of the ovary in females and two pairs of the testis in males
SOLUTION
Solution : A
One pair of ovaries and testis are present in human females and males respectively. Ovaries produce ovum and sperm is produced by the testis. Ovum is the female gamete and sperm is the male gamete. Ovum and sperm fuse to form the zygote.
Question 9
The diagram shows the female reproductive system. Where do fertilisation and implantation occur?
SOLUTION
Solution : A
P, Q, R and S are the fallopian tube, ovary, uterus and vagina respectively.
In the process of fertilisation, a mature ovum is released from either one of the ovaries. The sperm or the male gamete travels into the uterus and into the fallopian tube where the fertilisation takes place. After the fusion of the male and the female gamete, a fertilised egg or the zygote is formed. Gradually this zygote gets implanted into the wall of the uterus where the baby develops and gets its nourishment from the mother.
Question 10
During pollination, pollen grains get carried to _______ of the carpel.
SOLUTION
Solution : B
Pollination is the transfer of pollen grains from the anther of one flower to the stigma of the same or another flower. Pollen grains contain the male gamete and are present in the anthers of the flower. If the pollen grains land on the sticky surface called stigma of a suitable flower of the same species, a chain of events happen that ends in the development of seeds. The pollen grain on the stigma, grows a tiny tube, all the way down the style to the ovary. The ovary develops into a fruit after fertilisation.