Answer:
It is one of two known sets of nuclear fusion reactions by which stars convert hydrogen to helium.
Explanation:
the number of molecules in a certain substance
Answer: SECONDARY CELL WALL.
Explanation: When cell wall grow,it becomes thickened,then it further deposits new layers of a different material (different from that of the primary cell wall) from where secondary cell wall is formed.
This secondary cell wall is made up of cellulose,hemicellulose,and lignin.
They function in providing additional strength,support, rigidity to cells and the larger plant.
Endomembrane system include: the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus, lysosomes, vesicles, endosomes and the cell membrane, among others.
Answer:
The main factors affecting rate of photosynthesis are light intensity, carbon dioxide, concentration and temperature.
