Explanation

Independent assortment of genes and their corresponding traits was first observed by Gregor Mendel in 1865 during his studies of genetics in pea plants.

Explanation

Explanation

The organelle that has increased significantly in the muscle cells of an active athlete compared to a physically inactive individual of the same age is the Mitochondrion. 

Mitochondria are known as the "powerhouses" of the cell because they are responsible for producing the majority of the cell's energy in the form of ATP through aerobic respiration.

Explanation

Robert Hook described the cell as: Basic unit of life

Robert Hook  discovered cells: 1665

Cell is the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body

Explanation

Ultra Violet rays: most harmful and are almost completely absorbed by our atmosphere.

Explanation

Robert Brown discovered Nucleus in: 1831

Explanation

Cell discovered: 1665

Robert Hooke was: scientist

He belonged: UK

Explanation

The most abundant naturally occurring gas is nitrogen (N2), which makes up about 78% of air.

Oxygen (O2) is the second most abundant gas at about 21%.

The inert gas argon (Ar) is the third most abundant gas at 0.93%.

Explanation

The theory describing the universe's beginning with a rapid expansion from a hot, dense state is known as the Big Bang theory

is an American television sitcom created by Chuck Lorre and Bill Prady for CBS.

It aired from September 24, 2007, to May 16, 2019

Explanation

Oxygen is the chemical element with the symbol O and atomic number 8.