<span>Chlorofluorocarbons
(CFCs) chemicals contain carbon, chlorine and fluorine and is t so expensive at
the same time it’s not flammable, the reason why it is mainly used in business
such as refrigerators and plastics. However, these chemicals destroys our
stratosphere, the second layer of the Earth’s atmosphere and protects us by
blocking the ultraviolet radiation (UV Light). This type of radiation can seep
through organisms skins and can leave destructive effects on DNA molecules
which will also cause skin cancer.</span>
Answer:
TIME: a single bacterium can multiply to over two million in just seven hours.
WARMTH: the 'danger zone' temperatures at which bacteria grow best are between 5 Celsius and 63 Celsius.
FOOD: like any other living things, germs need food to grow.
WATER: Bacteria need moisture to grow.
thank you
PLS MARK AS BRAINLIST
Answer:
Biodiversity hotspots are regions under surveillance of humans where threatened and endemic species of flora and fauna are grown. These regions have been identified as some of the world's most important ecosystems.
The two criteria for designation as a biodiversity hotspot are:
1. It must possess at least 1500 vascular plant species as endemics : It means the region must have a high percentage of plant species which are found no where else in the world.
2. It must have 30% or less native vegetation : It means that the plant species population is endangered and threatened to extinction.
Im pretty sure its c. I did that a couple of years ago...I think
B. the contraction and relaxation of the brain
