How Do Organisms Reproduce - MCQ Test (22-11-2017) - Class 10 MCQ

Ovum is the female sex cell, or female gamete; the male gamete is the sperm. A gamete, ovum or sperm, contains half the number of chromosomes found in the body cells of the parent, i.e., the gamete is haploid. In human there are total 46 chromosomes, so human ovum has only 23 chromosomes.

Underground stem are modified plant structures that derive from stem tissue but exist under the soil surface

Scrotum decreases the temperation of the testes from 2-3 degrees lower than that of the body.

Mechanical Barrier methods include the diaphragm, cervical cap, male condom, and female condom and spermicidal foam, sponges, and film. Unlike other methods of birth control, barrier methods are used only when you have sexual intercourse.

In the leaves of Bryophyllum meristamatic marginal notches are present. From these meristamatic tissues new plants can develop after coming in contact of soil

Placenta connects the fetus to the uterine wall to uptake nutrients.

In the honey bee, fertilized eggs (diploid zygotes) regularly develop into females, and unfertilized eggs (haploid gametes) develop into males by types of reproduction known as zygogenesis and generative or haploid Parthenogenesis, respectively.

A bisexual flower consists of both the male and the female reproductive parts. The male part is known as the stamen and the female is the carpel/pistil.

The flowers in which either male or female reproductive organs are present.These flowers are called incomplete flowers 

In general, a woman's fertile window is the day of ovulation (usually 12 to 16 days before the cycle begins) and the five days preceding it

It is a quick method of multiplication Since the rate of multiplication is high there is overcrowding.

The ductus deferens, also known as the vas deferens, is a tiny muscular tube in the male reproductive system that carries sperm from the epididymis to the ejaculatory duct. There is a pair of these ducts in the male body, with one duct carrying sperm from each testis to the left and right ejaculatory ducts.

In humans, this event occurs when the de Graaf's follicles rupture and release the secondary oocyte ovarian cells. 

Oxytocin is secreted by the posterior pituitary gland at the time of parturation.

the propagation of plants by growing plantlets in tissue culture and then planting them out.

All of the following can be used for birth control. IUCD,Vasectomy,Tubectomy are surgical methods of birth control whereas contraceptive pills are oral pills

Pollen tube release 2 male gametes in the embryo sac. Out of thes 2 gametes 1 gamete gets fused with the egg and the other one gets fused with the polar nuclei.

The flowers appear earlier in plant growing by vegetative propagation.

Fallopian tube is the part of female reproductive sytem.

If menstruation starts then it signifies that no fertilization have taken place. Menstruation takes place in the first 3 to 5 days of the cycle

Hair and nails have a protein called keratin which allows them to grow. The process of growing of nails and hair is known as keratinization.

A species is often defined as the largest group of organisms in which two individuals can produce fertile offspring, typically by sexual reproduction.

The characteristics or traits of parents are transmitted to their progeny (offsprings) through genes present on their chromosomes

Tubal ligation is surgery to close a woman's fallopian tubes. (It is sometimes called "tying the tubes.") The fallopian tubes connect the ovaries to the uterus. A woman who has this surgery can no longer get pregnant
An Intrauterine Contraceptive Device (IUCD) is a device which is inserted into the uterus (womb) to prevent pregnancy. There are many types of IUCDs and they come in different shapes and sizes. Commonly used types are IUCDs containing copper.

Bees show haplodiploidy.

Donkey is a dioceious because it has male and female reproductive organs in seperate individual.

fertilisation is possible if ovulation has taken place during middle of the menstrual cycle

Syphillis and gonorrhea can be sexually transmitted.

Genetic drift cannot be removed by self pollination.

• Estrogen is the primary female sex hormone.. It is responsible for the development and regulation of the female reproductive system and secondary sex characteristics.
• Plasmodium reproduces by binary fission and not by regeneration.