Correct Answer: C. 1,776 km

Correct Answer: B. 2

Correct Answer: B) river blindness

Explanation

This Biology question is asking which of the given options is not sex-linked. The options are stunted growth, river blindness, haemophilia, and colour blindness. Sex-linked traits are traits that are carried on the sex chromosomes, X and Y. In humans, females have two X chromosomes while males have one X and one Y chromosome. This means that sex-linked traits are more commonly expressed in males as they only have one X chromosome. Out of the given options, the correct answer is river blindness. River blindness is caused by a parasitic worm that is transmitted by the black fly. It is not related to the sex chromosomes and is therefore not a sex-linked trait. Stunted growth, haemophilia, and colour blindness, on the other hand, are all sex-linked traits. Stunted growth can be caused by mutations on the X chromosome, haemophilia is a bleeding disorder caused by a deficiency in clotting factors that are carried on the X chromosome, and colour blindness is caused by mutations in genes on the X chromosome. It is important to understand sex-linked traits as they can affect the inheritance patterns of certain traits and diseases. For more information on sex-linked traits and inheritance patterns, please see the relevant sections of the recommended textbooks.

Correct Answer: B. C-D RAM

Correct Answer: D. react with the gas

Explanation

\(H_2SO_4\) and \(CaCl_2\) are not suitable for drying ammonia gas because they react with the gas.

Ammonia is a basic gas, and both \(H_2SO_4\) and \(CaCl_2\) are acidic. When these two substances react, they form salts that contain ammonia. This can contaminate the ammonia gas and make it unusable.

In addition, \(H_2SO_4\) is a corrosive substance, and \(CaCl_2\) can be harmful to breathe in. Therefore, it is not safe to use these substances to dry ammonia gas.

Correct Answer: A. 37.5cm

Explanation

If u=x, v = \(1\frac{1}{2}x \Rightarrow if u= 2x,v=3x\\

\frac{1}{f}=\frac{1}{u}+\frac{1}{v}; \frac{1}{15}=\frac{1}{2x}+\frac{1}{3x} \times \frac{5}{6}\\

X=\frac{75}{76}=12.5, v=3x=12.5\times 3=37.5\)

Correct Answer: D. be voted for

Explanation

The right to be voted for, also known as the right to hold public office, is an inalienable right that is typically reserved for citizens of a state. Non-citizens, even if they are permanent residents, are usually not allowed to run for public office.

Correct Answer: C. −4/7

Correct Answer: D. The production of goods for immediate consumption

Explanation

Investment is an activity of spending resources on creating assets that can generate income over a long period of time. It is flow of expenditures developed to projects producing goods which are intended for immediate consumption.

Correct Answer: D. copulation,gestation,parturition and lactation