WorksheetsXII - S1 - CHAP - 1 & 2 - 20.1.22
Total questions: 25
Worksheet time: 13mins
Human beings are an example for ___________ breeders
continuous breeders'
discontinuous breeders'
seasonal breeders'
all the above
Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
Reason: Asexual reproduction involves only mitosis and no meiosis
a) both A and R are true and R is correct explanation for A
b) both A and R are true but R is not the correct explanation for A
R is the correct explanation for A
d) A is not correct but R is correct
Match the following:
Types of syngamy Organisms
a. Autogamy i. Monocystis
b. Exogamy ii. Trichonympha
c. Hologamy iii. Human beings
d. Isogamy iv. Paramecium
a) a - iii, b - iv, c - ii, d - i
b) a - ii, b - i, c - iv, d - iii
c) a - iii, b - iv, c - i, d - ii
d) a - iv, b - iii, c - ii, d - i
Assertion (A) : Organisms show three phases in their life cycle.
Reason (R) : Juvenile phase is a degenerative phase.
a) A is correct R but is incorrect
b) Both A and R are correct
c) R is the correct explanation for A
d) A is not correct but R is correct
Assertion (A) : Asexual reproduction is called blastogenic reproduction.
Reason (R) : It is accomplished by mitotic and meiotic divisions.
a) A and R are correct
b) A is correct but R is incorrect
c) Both A and R are incorrect
d) R is the correct explanation for A
Assertion: The uterus or womb is a hollow, thick-walled, muscular, highly vascular and inverted pear shaped structure lying in the pelvic cavity between the urinary bladder and rectum.
Reason: The major portion of the uterus is the body and the rounded region superior to it, is the fundus.
a) Both assertion and reason are true and the reason is the correct explanation of the assertion
b) Both assertion and reason are true but the reason is not the correct explanation of the assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false statements
Assertion: The inner cell mass in the blastula is differentiated into epiblast and hypoblast immediately after implantation.
Reason: The hypoblast is the embryonic endoderm and the epiblast is the ectoderm.
a) Both assertion and reason are true and the reason is the correct explanation of the assertion
b) Both assertion and reason are true but the reason is not the correct explanation of the assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false statements
Assertion: The stratified epithelium of the seminiferous tubule is made of two types of cells namely sertoli cells or nurse cells and spermatogonic cells or male germ cells.
Reason: Sertoli cells are elongated and pyramidal and provide nourishment to th sperms till maturation.
a) Both assertion and reason are true and the reason is the correct explanation of the assertion
b) Both assertion and reason are true but the reason is not the correct explanation of the assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false
statements
Assertion : In human male, testes are extra abdominal and lie in scrotal sacs.
Reason : Scrotum acts as thermoregulator and keeps temperature lower by 2°C for normal sperm production .
a) Assertion and Reason are true, Reason is the correct explanation of Assertion
b) Assertion and Reason are true, Reason is not the correct explanation of Assertion
c) Assertion is true, Reason is false
d) Both Assertion and Reason are false
Assertion: Semen or seminal fluid is a milky white fluid which contains sperms and the seminal plasma (secreted from the seminal vesicles, prostate gland and the bulbourethal glands).
Reason: The seminal fluid acts as a transport medium, provides nutrients, contains chemicals that protect and activate the sperms and also facilitate their movement.
a) Both assertion and reason are true and the reason is the correct explanation of the assertion
b) Both assertion and reason are true but the reason is not the correct explanation of the assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false statements
Assertion: In bee society, all the members are diploid except drones.
Reason: Drones are produced by parthenogenesis.
a) Both A and R are true and R is correct explanation for A
b) Both A and R are true but R is not the correct explanation for A
c) A is true but R is false
d) both A and R are false
Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
Reason: Asexual reproduction involves only mitosis and no meiosis.
a) Both A and R are true and R is correct explanation for A
b) Both A and R are true but R is not the correct explanation for A
c) A is true but R is false
d) both A and R are false
Assertion: Development of an egg into a complete individual without fertilization is known as parthenogenesis.
Reason: In certain animals, parthenogenesis occurs regularly, constantly and naturally in their life cycle and is known as natural parthenogenesis.
a) Both assertion and reason are true and the reason is the correct explanation of the assertion
b) Both assertion and reason are true but the reason is not the correct explanation of the assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false statements
Identify the incorrect statement regarding parthenogenesis.
a) Development of sperm without fertilization
b) It was first discovered by Charles Bonnet
b) Honey bees exhibit incomplete parthenogenesis
c) Amphitoky is a type of natural parthenogenesis
Identify the wrong statement.
a) Oviparous animals lay eggs
b) Viviparous animals give rise to young ones
c) Ovoviviparous animals lay eggs and then hatch it to young ones
d) Amphibians are oviparous animals
Pick out the organism whose fertilization occurs internally.
a) reptiles
b) sponges
c) pisces
d) amphibians
The process which the sperm undergoes before penetrating the ovum is
a) Spermiation
b) Cortical reaction
c) Spermiogenesis
d) Capacitation
The Androgen Binding Protein (ABP) is produced by
a) Leydig cells
b) Hypothalamus
c) Sertoli cells
d) Pituitary gland
Assertion : Ovulation is the release of ovum from the Graafian follicle.
Reason : It occurs during the follicular phase of the menstrual cycle.
a) Assertion and Reason are true, Reason is the correct explanation of Assertion
b) Assertion and Reason are true, Reason is not the correct explanation of Assertion
c) Assertion is true, Reason is false
d) Both Assertion and Reason are false
The developing spermatoza are nourished by ___________
a) Leydig cells
b) Sertoli cells
c) Follicular cells
d) Epididymis
Which of the following statement is not correct?
(i) Interstitial cells are seen surrounding the seminiferous tubule.
(ii) Nurse cells secrete inhibin.
(iii) Males have single prostate gland which encircles the urethra.
(iv) Insemination, Fertilization, Implantation, Placentation and Parturition.
a) i and ii
b) iii only
c) iii and iv
d) iv only
Organ of copulation in human female is __________.
a) Cevix
b) Fundus
c) Vagina
d) Uterus
Identify the gland which is homologous to the Cowper's glands of male.
a) Bartholin's gland
b) Bulbourethral gland
c) Prostate gland
d) Skene's gland
Spermatid A spermatozoa. What does 'A' stands for?
a) Spermatogenesis
b) Spermiation
c) Spermiogenesis
d) Gametogenesis
Given below are the extra embryonic membranes of which identify the outermost membrane.
a) Amnion
b) Chorion
c) Yolk sac
d) Allantois
