Explanation

The heavily doped region of a transistor is called the emitter.

The emitter's heavy doping ensures it injects a large number of charge carriers (electrons in NPN transistors, holes in PNP transistors) into the base region, which is crucial for the transistor's operation. 

Explanation

After ovulation, the ruptured follicle forms a structure called the corpus luteum, which produces large amounts of progesterone.

This hormone is crucial for preparing the uterine lining for potential pregnancy if fertilization occurs. 

Explanation

 The limiting reactant (or limiting reagent) is the reactant that controls the amount of product formed in a chemical reaction

Because it is the substance that is completely consumed first, thereby limiting the extent of the reaction. 

Explanation

 The endocrine gland that secretes oxytocin is the Pituitary gland. 

While oxytocin is produced in the hypothalamus,

It is stored and released by the posterior pituitary gland. 

Explanation

In a closed organ pipe, the fundamental frequency is f = v / 4L.  

If both ends are opened, it behaves like an open pipe, and the fundamental frequency becomes f' = v / 2L.

So, f' = 2f.

Explanation

The reverse process of X-ray production is related to the "photoelectric effect". 

Photoelectric effect: In this process, a high-energy photon interacts with an atom, transferring all its energy to an electron and ejecting it from the atom.

This is the reverse of X-ray production, where electrons are accelerated to high speeds and generate X-rays when they collide with a target atom. 

Explanation

An equilibrium constant expression can be applied to an aqueous solution of table salt. 

Explanation:

An equilibrium constant expression is used for reversible reactions where the concentrations of reactants and products reach a constant state.

Table salt (sodium chloride) dissociates into Na+ and Cl- ions in water, and this dissociation can be considered a reversible reaction. Thus, the equilibrium constant can be applied to this system. 

Explanation

Lactic acid is not an amino acid; glutamic acid, aspartic acid, and glycine are all amino acids. 

Lactic acid:

This is an organic compound involved in energy metabolism, but it does not have the characteristic structure of an amino acid. 

Explanation

A biome is a large regional community primarily determined by climate.

Biomes are characterized by distinct plant and animal life adapted to the region's specific climate,

Including temperature and precipitation patterns.

These communities are large-scale terrestrial ecosystems, grouping ecosystems with similar climatic conditions. 

Explanation

Spiral cleavage is characterized by diagonal cleavage planes that are not symmetrical between the poles, resulting in unequal blastomeres arranged in a spiral pattern.

Determinate cleavage means that the fate of each blastomere is predetermined early on, meaning each cell has a specific developmental role.