Explanation

Sexual reproduction is the type of reproduction that involves the fusion of gametes (sperm and egg cells) to produce offspring with a unique combination of genetic traits.

This process introduces genetic variation, which is essential for evolution to occur.

Explanation

The skeleton is the framework that gives shape to the human body and provides support, protection, and movement.

It consists of bones, cartilage, and ligaments that work together to form a structural system.

Explanation

The radioactive decay equation shows a parent nucleus (91Pa^233) decaying into a daughter nucleus (92U^233) with the emission of a particle.

The parent nucleus has an atomic number of 91 (Protactinium), and the daughter nucleus has an atomic number of 92 (Uranium).

This increase in atomic number indicates that a beta particle (β) has been emitted.

Explanation

To determine the symbol of element B with five protons and six neutrons, we can follow these steps:

The number of protons (atomic number) determines the element. An element with five protons is boron (B).

The mass number (A) is the sum of protons and neutrons. For this element, it is 5 + 6 = 11.

Therefore, the symbol for this element is 11B.

Explanation

The atomic mass (also known as atomic weight) of an element is the total mass of protons and neutrons present in the nucleus of an atom.

This includes:

• Mass of protons (which defines the element)
• Mass of neutrons (which varies in different isotopes)

Explanation

• If the area of the parallel plate capacitor is doubled, the capacitance will also double.
• The capacitance of a parallel plate capacitor is directly proportional to the area of the plates: C = ε × (A/d)
  

Explanation

The direction of the electric force (F) and electric field intensity (E) are parallel to each other.

The electric field intensity is a vector quantity that points in the direction of the force that would be experienced by a test charge at a given point.

Explanation

Sound waves require a physical medium, such as air, water, or solid objects, to propagate.

They cannot travel through a vacuum because there are no particles to transmit the energy.

Explanation

Spectroscopy is a analytical technique used to measure the interaction between matter and electromagnetic radiation, such as light.

It is used to assess the concentration or amount of a given atomic, molecular, or ionic chemical species by measuring the absorption, emission, or scattering of light by the species.

Explanation

Starch is a polysaccharide, a long chain of glucose molecules linked together through glycosidic bonds.

It is a complex carbohydrate that serves as a energy storage molecule in plants.