Explanation

A generator is a device that converts mechanical energy to electrical energy for use in an external circuit.
A generator works on the principle of electromagnetic induction.

Explanation

All Pakistani travelers embarking on international visits will be required to carry a valid polio vaccination certificate from June 1, 2014

ND27-7-2023

Explanation

If Xylem is removed from a plant, the plant will not be able to transport water to leaves, 

hindering various processes like photosynthesis, transpiration, growth, etc.

The plant will initially wilt and then ultimately die.

The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.

Explanation

Uranium is the most widely used fuel by nuclear power plants for nuclear fission.

Nuclear power plants use a certain type of uranium—U-235—as fuel

because its atoms are easily split apart.

Explanation

Penicillin is an antibiotic that can be made from the fungus Penicillium notatum or Penicillium chrysogenum.

Penicillin was discovered by Alexander Flaming In 1928

Penicillin was the first true antibiotic

The first patient Albert Alexander, a 43-year-old policeman, was treated with penicillin on 12 February 1941

Alexander Flaming determined that penicillin had an antibacterial effect and published his findings in 1929 

Explanation

The leaves appear green in white light because they reflect only the green light and absorb lights of all other colors. 

Explanation

In fact, at least 75 percent of flowering plants are pollinated by insects and animals, including:

bees,

butterflies,

hummingbirds,

moths,

and bats.

Explanation

social interaction is a basic human need

***

Detail concept

Human well-being relies on intimate social connections.

In a recent study published in Nature Neuroscience,

a team of researchers led by Rebecca Saxe,

a neuroscientist at the Massachusetts Institute of Technology reported :

that social interaction is a basic human need,

just like food and water

The five types of social interaction are

exchange, cooperation, conflict, coercion, and competition

NA23-7-2023

SH1-8-2023

Explanation

Coenzymes are mostly derived from vitamins and other organic essential nutrients in small amounts