Explanation

The major component of the troposphere is nitrogen, which makes up about 78% of the air in this layer

The troposphere also contains a significant amount of oxygen (around 21%)

Smaller amounts of other gases like argon, water vapor, and carbon dioxide. 

Explanation

Endocardium lines the inner chambers of the heart.

Myocardium is the thick, muscular middle layer responsible for contraction.

Epicardium is the outermost protective layer.

Together, these three layers make up the complete structure of the heart wall.

Explanation

During prophase, the cytoplasm becomes more viscous to help stabilize the cell as chromosomes condense and the spindle apparatus begins to form.

This change supports the reorganization of cellular components needed for mitosis.

Explanation

Explanation

Another name for the knee-chest position is genupectoral position.

It is used in medical situations such as gynecological exams, lumbar spine surgery, and labor to address issues like a prolapsed cord.

Explanation

Adrenaline (also known as epinephrine) increases the following effects on the heart:

Heart Rate:

Adrenaline increases the heart rate (positive chronotropic effect).

Contractility:

It increases the force of heart muscle contractions (positive inotropic effect).

Conduction Velocity:

It enhances the speed of electrical conduction through the heart (positive dromotropic effect).

Cardiac Output: 

Due to the increased heart rate and contractility, adrenaline boosts the overall cardiac output.

Explanation

• Air pollution is actually considered the most dangerous type of pollution.
• According to the World Health Organization (WHO), air pollution is responsible for an estimated 7 million premature deaths worldwide each year, mainly due to heart disease, stroke, and lung cancer.

Explanation

• Deserts are areas with very low rainfall, typically less than 25 centimeters (10 inches) per year.
• It resulting in a barren and often sandy landscape with limited vegetation and wildlife.

Explanation

• Reproduction is the process by which living organisms increase their numbers.
• Either sexually or asexually, to produce offspring and ensure the continuation of their species.

Explanation

• Aerobic respiration is the process of cellular respiration that uses oxygen (O2) to generate energy from glucose.
• It is the primary method of energy production in humans and other animals, and it produces carbon dioxide and water as byproducts.