Answer:
Until recent history,extinctions have always happened gradually and on a small scale.
Explanation:
Extinction occur when environmental factors like natural disaster,habitat fragmentation,over exploitation,global change don't favor the survival of species thus gradually leads to extinction of species.
Some times human activity becomes the major problem for extinction.More over,poor reproduction,decline in population number and genetic inbreeding also leads to extinction.
99% of all species that exist on earth become disappeared.
Evolution leas to speciation which leas to formation of new species but species become extinct when they are unable to survive against competition.
Answer:
A.
Explanation:
A parasite does not feed it's host; in fact, it takes food energy/ food from it's host.
Answer:
- covers and lines body surfaces
- minimal intercellular substance
- cells are densley packed together
- cells rest on basement membrane
- simple (single line of cells) and stratified (multiple layers)
- squamous (oval like shape), cuboidal (cube shape), columnar (long rectangle shape)
- vascular (tissue doesn't have its own blood supply)
Explanation:
Hope this helps!
Since the amount of decay is too much, the dental assistant should respond by advising the mother of the patient to reduce the quantity of sugary food intake and to enhance oral hygiene.
A dental assistant is an individual that are usually certified to assist dentists during dental treatment procedures.
During a dental procedure, they help to perform the following tasks:
- preparing patients for the treatment,
- passing dentists instruments and other materials, and
- keeping patients' mouths dry and clear using suction and other devices.
Tooth decay is the formation of a hole through the tooth cavity.
Tooth decay can occur in several areas when there is poor oral hygiene and excess intake of sugary foods.
When sugary food is taken in excess without proper oral hygiene, it reacts with plaque bacteria in the mouth producing acids.
The acid then dissolves your enamel slowly, creating the cavities in your teeth.
Therefore, the dental assistant should respond by advising the mother of the patient to reduce the quantity of sugary food intake and to enhance oral hygiene.
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