Daily NEET MCQ- May 20, 2022 - NEET MCQ

The drug AZT is used for preventing or treating AIDS, while cisplatin & taxol are for cancer and codeine is a sort of painkiller. The drug AZT is also known as Zidovudine. This drug AZT is an antiretroviral drug. It’s used along with other drugs as a combination.

In rusting of iron, the oxidation state of iron changes, but in the conversion of water to ice, crumpling a sheet of aluminum foil and casting silver the chemical state remains same whereas the physical state changes. When iron is exposed to oxygen, iron oxide formation takes place.

ICBN stands for International Code for Botanical Nomenclature. ICBN deals with the nomenclature of the plants. International Code for Zoological Nomenclature (ICZN) is responsible for the binomial; nomenclature of animals.

Carolous Linnaeus introduced the system of Binomial Nomenclature. Charles Darwin came up with the theory of evolution. Henry Cavendish is the one who discovered hydrogen. James Chadwick is the one who discovered neutron.

The increasing orders of similarities among various taxa are: Kingdom<Phylum<Class<Order<Family<Genus<Species
Similarities increase along the above order and differences decrease along the above order.

Since aquatic arthropods and mollusks are mainly in water, they use gills for respiration. These gills are present as outgrowths to their skin, which is covered by the exoskeleton. The exchange of gases takes place through these gills.

A scalar quantity is one which only has a magnitude. Examples of scalar quantities are mass, volume, work, energy etc.

The resultant vector is the vector which is obtained by the addition or subtraction of two vectors. The resultant vector can either be calculated by using the graphical method or the analytical method.

Dot product of two vectors gives a scalar quantity as the output. Cross product gives a vector as the output. It is also known as scalar product.

Vector addition and subtraction give a vector as the output. Cross product also gives a vector as the output. Only Dot product gives a scalar after acting on two vectors.