Biology - Online Test
Q1. Tendrils in plants are an example of
Answer : Option B
Explaination / Solution:
Convergent evolution is different structures evolving for the same function and hence having similarity. Analogous organs are example of convergent evolution. Tendril of plants is example of these kinds of evolution.
Q2.
Which is true about uses of contraceptive methods?
a. They are practiced against natural reproductive events.
b. They are used to prevent pregnancy or to delay or space pregnancy.
c. Uses of these methods may cause nausea, abdominal pain, irregular menstrual bleeding etc.
Answer : Option D
Explaination / Solution:
Contraceptive methods are practiced against natural reproductive events. They are generally used to prevent unwanted pregnancy or space between pregnancy. Use of contraceptive methods may cause nausea, abdominal pain, irregular menstrual bleeding etc.
Q3. Single nucleotide polymorphism (SNPs) revolutionize the process of finding chromosomal locations for
Answer : Option C
Explaination / Solution:
Scientists have identified about 1.4 million locations where single base DNA differences (SNPs) occur in human. This information is helpful in finding chromosomal locations for disease-associated sequences and human history.
Q4. The secretory phase of in the human menstrual cycle is called as
Answer : Option A
Explaination / Solution:
Menstrual cycle is divided into three phases menstruation phase, follicular phase or proliferative phase and luteal phase or secretory phase.
Q5. Disturbance in genetic equilibrium or Hardy-Weinberg equilibrium in a population is due to
Answer : Option C
Explaination / Solution:
Disturbance in genetic equilibrium in a population is due to evolution. Evolution occurs due to variation and natural selection. Variation is due to change in alleles.
Q6. Statement I: Ideal contraceptive should be easily available, effective and reversible without no or least side effects.
Statement II: Condom is a barrier method of contraception that prevents from HIV infection also.
Statement III: Surgical method of contraception is reversible.
Statement II: Condom is a barrier method of contraception that prevents from HIV infection also.
Statement III: Surgical method of contraception is reversible.
Answer : Option A
Explaination / Solution:
Ideal contraceptive should be easily available, effective and reversible without or least side effects. Condom is used to prevent unwanted pregnancy along with prevention against HIV infection. Surgical method of contraception is irreversible.
Q7. Human genome project was 13 year project co-ordinated by
Answer : Option A
Explaination / Solution:
The Human Genome Project was a 13-year-long, publicly funded project initiated in 1990 with the objective of determining the DNA sequence of the entire euchromatic human genome within 15 years.
It was co-ordinated by U. S. Department of energy and National institute of health.
At any given time, approximately 200 labs in the United States were funded by either the National Institutes of Health or the U.S. Department of Energy to support these efforts.
Later on, Welcome trust of U.K becomes the major partner of this project.
Q8. The cellular layer that disintegrates and regenerates again and again is
Answer : Option B
Explaination / Solution:
Endometrium is the inner lining of uterus which disintegrates and regenerates again and again during menstrual cycle.
Q9. Which of the following is a source of variation in a population?
Answer : Option D
Explaination / Solution:
The source of variation includes the mutation, crossing over during cell division and inherited genetic traits may also change due to mutation to create variation.
Q10. In IVF technique, fusion of ovum and sperm take place in
Answer : Option C
Explaination / Solution:
In vitro fertilisation technique involves fertilisation outside the body in culture media followed by embryo transfer in fallopian tube or uterus.
