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A packet is dropped from a balloon which is going upwards with the velocity $12 \text{ m/s}$, the velocity of the packet after $2 \text{ seconds}$ will be:
The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as :
Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement:
When a tall pea plant with round seeds was selfed, it produced the progeny of tall plants with round seeds and some dwarf plants with wrinkled seeds. The genotype of the parent is:
In his classic experiments on pea plants Mendel did not use?
Which of the following velocity-time graphs shows a realistic situation for a body in motion?
If a body is thrown up with the velocity of $15 \text{ m/s}$, then the maximum height attained by the body is: (assume $g = 10 \text{ m/s}^2$)
If a female individual is with small round head, furrowed tongue, partially open mouth and broad palm with characteristic palm crease. Also the physical, psychomotor and mental development is retarded. The karyotype analysis of such an individual will show :
Which one of the following can be explained as the basis of Mendel's Law of dominance? A: Out of one pair of factors, one is dominant and the other is recessive. B: Alleles do not show any expression and both the characters appear as such in F2 generation. C: Factors occur in pairs in normal diploid plants. D: The discrete unit controlling a particular character is called factor. E: The expression of only one of the parental characters is found in a monohybrid cross.
Independent assortment of genes does not take place when:
A small block slides down on a smooth inclined plane starting from rest at time $t=0$. Let $S_n$ be the distance traveled by the block in the interval $t=n-1$ to $t=n$. Then the ratio $\frac{S_n}{S_{n+1}}$ is:
What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile?
Study the pedigree chart given below: What does it show?
The probability of four sons to a couple is:
A genetic map is one that:
In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?
The time of reverberation of a room $A$ is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double those of room $A$?
The best example of pleiotropy is:
Alleles are:
Emergency contraception involves administering any of the following within 72 hours of unprotected sexual activity except: