Explanation

A permanent change in the genetic structure of a gene is called a mutation. 

A mutation refers to a change in the DNA sequence of a gene, which can lead to alterations in the protein it encodes. 

Explanation

Poaceae, also called Gramineae

It is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses

Explanation

Plasmids are replicons that are maintained as discrete, extrachromosomal genetic elements in bacteria.

Explanation

Gains more weight in the last 10 weeks of gestation than in the first 30 weeks

Fetuses tend to gain more weight in the later stages of pregnancy as they grow rapidly.

The heart is the first organ to form in the developing fetus.

The heart is formed after one month of pregnancy.

Explanation

"The branch of science concerned with the nature and properties of matter and energy.

The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."

Explanation

 In fructose, the functional group ketone is present on carbon number 2.

This is why fructose is classified as a ketohexose, a six-carbon sugar containing a ketone group. 

Explanation

If a vector is given as →A = xi, its magnitude is simply |→A| = √(x²) = x (assuming x ≥ 0).

Explanation

A group of bears is called a sleuth or a sloth.

sleuth animal

Sloths are mammals. They are part of the order Pilosa, which is also home to anteaters. Together with armadillos, sloths and anteaters form the magnorder Xenarthra.

Explanation

 A rotary kiln used in waste treatment (like incineration or cement production) typically has four zones:

   - Drying zone

   - Preheating zone

   - Combustion zone

   - Cooling zone

Explanation

The optimal pH for most arginases is in the alkaline range, with values typically between 9.0 and 10.0, though variations exist depending on the source and specific arginase isoform.

Arginase is an enzyme with an optimal pH around 9.7, where it functions best to convert arginine into urea and ornithine in the urea cycle.