Answer:
Bone.
Explanation:
Calcium is one of the important element present in the body. Calcium plays an important role in the muscle contraction. The calcium ions also acts as a signalling molecule during cell signalling.
The calcium is present in our extracellular fluids, bones, and teeth. The major constituent of calcium is present in the bone. The bone consists of around 90% body;s calcium.
Thus, the correct answer is option (b).
D. Polar regions receive less solar energy and heat per unit area than tropical regions
Less direct sunlight means that there is less concentration of direct solar rays. This would influence temperature and would ultimately create weather, and since this pattern continues of switching direct ray latitudes, this would create climate zones all over the Earth, and similar ones with similar latitude and terrain.
Answer:
DNA is a double stranded molecule that belongs to a group of larger molecules (macromolecules) called NUCLEIC ACIDS.
Nucleic acids are formed by joining together many smaller molecules called NUCLEOTIDES.
Nucleotides consist of:
- Pentose sugar (pentagon)
- Phosphate group (circle)
- Nitrogenous (rectangle)
Answer:
Solid
Explanation:
A radio device is a solid type of matter.
- Matter is anything that has weight and occupies a space
- There are three main categories of matter which are solid, liquid and gas
- A solid state of matter is made up of substances with a definite volume and a fixed shape.
- A radio has a fixed shape. Most of the come in a solid cuboidal or cube shape
- The volume of this three dimensional body can be measured which connotes the space it occupies at any given time.
- The mass of the radio can be taken using a balance.
The movement of ions across the cell of a membrane of higher regions of concentration.
