Explanation

Explanation

Explanation

Photochemical smog:

• NOX is one of the primary causes of photochemical smog.
• Photochemical smog is a condition that develops when primary pollutants (such as oxides of nitrogen and volatile organic compounds) interact under the influence of sunlight to produce a mixture of secondary pollutants.
• Thus photochemical smog is mainly composed of oxides of nitrogen, volatile organic compounds (primary pollutants), ozone, and peroxyacetyl nitrate (PAN) (secondary pollutants).

Note:

It depends on primary pollutants as well as the formation of secondary pollutants.

Primary pollutants include

1. Oxides of nitrogen, particularly nitric oxide (NO) and nitrogen dioxide (NO2)
2. Volatile organic compounds.

Secondary pollutants include

1. Peroxyl-acyl nitrates (PAN)
2. Tropospheric ozone
3. Aldehydes

An important secondary pollutant for photochemical smog is ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight.

Explanation

Explanation

The elephant is the largest living terrestrial mammal

Size: The elephant is the largest animal on land. 

Other mammals: The blue whale is the largest mammal overall, weighing up to 400,000 pounds and reaching up to 98 feet in length

Explanation

A meteoroid is a small rocky or metallic body in outer space.

Bodies that usually fall from the sky to the Earth are called Meteorites.

These are small particles from space that enter Earth's atmosphere and survive to land on its surface.

Explanation

Paleontology is the branch of science concerned with the study of fossils and the history of life on Earth

Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things

that have been replaced by rock material or impressions of organisms preserved in rock.

y.

Explanation

Instead of nostrils, insects breathe through openings in the thorax and abdomen called spiracles.

Insects that are diapausing or non-mobile have low metabolic rates and need to take in less oxygen.

Insects exchange oxygen and carbon dioxide through spiracles (noted by circle)

Explanation

During infection, fungi typically penetrate plant tissues through Stomata

Fungi often enter plant tissues through natural openings like stomata, which are small pores on the surface of leaves. 

Explanation

Gigantism and Dwarfism are diseases related to the growth hormone of the adenohypophysis.