Answer: Nervous system.
Explanation:
Nervous system is the system found in animals that consist of all nerves and specialized cellscalled neurons and function in receiving and transmitting information to all part of the body.
Nervous system is divided into two:
Peripheral and Central nervous system.
The peripheral system consist mainly of nerves which connect Central nervous system to the other part of the body.
Nerves that transmit signals to the brain are called motor or effetent., While those that transmit signals from the body to the brain are called afferent nerves.
The Central nervous system consist of the brain and spinal cord.
B) All living things are made of cells.
Answer:
Radon 222.
Explanation:
This is a chemically inert gas that is colourless and odourless but it is radioactive. It is produced by uranium in rock. From seeping through foundation, its accumulation can cause lung cancer. Also, as a radioactive gas, it can be also used to in hospitals to cure ailments which includes tumour , cancer and other diseases.
Answer:
Heterojunction or having two identical alleles of the same gene.
Explanation:
A heterojunction is an interface that occurs between two layers or regions of dissimilar semiconductors. These semiconducting materials have unequal band gaps as opposed to a homojunction. It is often advantageous to engineer the electronic energy bands in many solid-state device applications, including semiconductor lasers, solar cells and transistors. The combination of multiple heterojunctions together in a device is called a heterostructure, although the two terms are commonly used interchangeably. The requirement that each material be a semiconductor with unequal band gaps is somewhat loose, especially on small length scales, where electronic properties depend on spatial properties. A more modern definition of heterojunction is the interface between any two solid-state materials, including crystalline and amorphous structures of metallic, insulating, fast ion conductor and semiconducting materials.
