Zoology - Online Test
Q1. Correct order is
Answer : Option C
Explaination / Solution:
The correct order of geological periods is Paleozoic, Mesozoic and Coenozoic. Each period have characteristic plants and animals evolved over the period of time.
Q2. Gamete intra fallopian transfer (GIFT) is useful for
a. Female that does not produce eggs or ovum but can provide suitable environment for fertilisation and further development.
b. Female that have blocked fallopian tube that carry ovum and fertilized egg to uterus.
a. Female that does not produce eggs or ovum but can provide suitable environment for fertilisation and further development.
b. Female that have blocked fallopian tube that carry ovum and fertilized egg to uterus.
Answer : Option B
Explaination / Solution:
Some infertile females are not able to produce ovum or egg but can provide suitable medium for fertilisation and further development of embryo. In such females gamete intra fallopian transfer technique is used to conceive.
Q3. The technique of DNA fingerprinting has many applications ranging from identifying paternity to finding criminals. The sensitivity of the technique has been increased by use of
Answer : Option C
Explaination / Solution:
Polymerase chain reaction (PCR) is a technique used in molecular biology to amplify a single copy or a few copies of a segment of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence.
This increae the sensitivity of the technique.
Q4. Which germinal layer forms blood, heart, blood vessels etc.?
Answer : Option B
Explaination / Solution:
Human beings are triploblastic. The outer layer is called ectoderm that forms central nervous system and nerves etc. The middle layer or mesoderm forms heart, blood and blood vessels. The inner layer forms liver, pancreas etc.
Q5. Which of the following is an example of environmental variation?
Answer : Option A
Explaination / Solution:
Environmental variation is the change in traits due to environmental factors like temperature, humidity, soil water precipitation etc. Dying hair colour blue or any other colour is environmental variation.
Q6. DNA fingerprinting involves identifying differences in some specific regions of DNA sequence called repetitive DNA because
Answer : Option A
Explaination / Solution:
In specific regions of DNA sequence, a small stretch of DNA is repeated many times. The repetitive DNA are separated from bulk genomic DNA during density gradient centrifugation.
Q7. Amniotic fluid is
Answer : Option B
Explaination / Solution:
The inner foetal membrane invests the embryo and forms a space called amniotic cavity. It is filled with fluid called amniotic fluid. It is useful for studying chromosomal abnormalities of foetus.
Q8. What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?
Answer : Option A
Explaination / Solution:
The most significant trend in the evolution of modern man from his ancestors is the increasing cranial cavity. Bony cavity inside which bone is located is called cranium. Cranial capacity increased from 900cc to 1400cc in course of evolution.
Q9. In human beings 99.9% of genome sequence are same in all individuals only 0.1% of genome differ that
Answer : Option B
Explaination / Solution:
Genome variations are differences in the sequence of DNA from one person to the next
In human’s 99.9% of the base sequences of DNA are same & are referred as Bulk genomic DNA.
The difference lies in remaining 0.1%. It is these differences which make every individual unique in their phenotypic appearance. This DNA has small stretches of repetitive sequences. They are referred as Repetitive DNA.
Q10. Haploid nucleus of sperms and a haploid ovum fuse together to form
Answer : Option B
Explaination / Solution:
Haploid nucleus of sperms and a haploid ovum fuse together to form diploid zygote. Zygote undergoes mitotic division to form embryo and fetus.
