General Science - Online Test
Q1.
Identify the part of Blastocyst labelled as “A”
Answer : Option D
Explaination / Solution:
Merula divides mitotically and transforms into blastocyct. The blastomeres in the blastocyst are arranged into an outer layer called trophoblast.
Q2. Identify data which are statistics
Answer : Option A
Explaination / Solution:
No Explaination.
Q3. Diamond is covalent, yet it has high melting point. because of
Answer : Option A
Explaination / Solution:
carbon atom undergoes Sp3 hybridization and linked to four other carbon atoms by using hybridized orbitals in tetrahedral fashion led a rigid three dimensional extended network thought the lattice.
Q4. 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.
Q5. 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.
Q6. 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.
Q7. 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.
Q8. Identify the data which are not statistics
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. The valence shell electronic configuration of p-block elements is ns2np1 - 6 But this is not true in the case of
Answer : Option A
Explaination / Solution:
As only one Ist period element of p-block, it has unique 1s2 configuration besides other element of that block (ns2np1 - 6) . It is a noble gas.
Q10. 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.
