B. law of conservation of mass
This is why the total amount of and element before and after a chemical reaction is constant.
The time when you can't see any of the moon at all is called "New Moon".
14.77 days later, the phase is "Full Moon".
Answer:
They do not contain chromosomes. (Ans.C).
Explanation:
Cyanobacteria also known as blue-green algae, they are heterogeneous group of photosynthetic prokaryotic organisms. Like prokaryotes such as bacteria, cyanobacteria lack endoplasmic reticulum, mitochondria, membrane bound nucleus, and Golgi apparatus. Bacteria are simpler than other organisms, and single celled microbes.
Both bacteria and cyanobacteria reproduce through the asexual method either by binary fission in unicellular, multiple fission in colonial form or by spore formation, and fragmentation in filamentous species.
Diseases have multiple ways of infiltrating your body. Diseases can be transported through blood, air, and physical touch. Once the disease has infiltrated the body, it can spread through out the body in many ways. One of which is by feeding off of other cells energy and reproducing. The pathogens travel through the blood and irritate cells. The irritation of cells can cause the body to consume more energy, to repair the damage. This causes symptoms like tiredness, regurgitation, and sometimes in extreme cases, death.
Answer:
The condition of the Earth had to become favourable before it could support any form of life.
The formation of the different layers around the earth like the ozone layer was necessary before life could originate. Primitive species such as some prokaryotes were able to live in hydrothermal conditions during the initial times. With the passage of time, as the concentration of oxygen increased due to photosynthetic prokaryotes, situations became favourable for eukaryotic organisms to arise.
