posin may become a Hazzard to people who or vacation outdoors
These are all part of the head or skull. The cavities of the
skull surround and protect the brain and sensory organs. There are five kinds
of cavities of the skull which are:
nasal cavity (paranasal sinuses is included here) - The
nasal septum split the respiratory system into two lateral halves, the nasal
cavity is also part of the respiratory system.
<span>cranial cavity - The large cranial cavity is split
into a posterior cranial fossa and an anterior cranial
fossa, a middle cranial fossa. Its function is to support the
brain.</span>
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oral cavity - The oral, or buccal, cavity (commonly called
the mouth) is a cavity of the head rather than a cavity of the skull because of
its fleshy and muscular floor.
orbital cavity - supports and defends an eyeball and its linked
muscle, vessels, and nerves.
<span>middle ear cavity - From outer to inner, three small bones-malleus,
incus, and stapes are situated within the middle-ear cavities in the
petrous part of the temporal bones.</span>
B. cerebellum, the cerebellum is responsible for all these as well as maintaining muscle tone
Answer:
photosynthesis produce food for plants
Answer:
A point mutation can be described as a mutation in which changes occur in a single nucleotide. A nucleotide may get changed, deleted or inserted from the sequence of DNA. Point mutations can be harmless or harmful depending on the nucleotide in which the changes occur.
A change in just one nucleotide can result in the formation of wrong amino acid and hence changed or wrong proteins can be formed. If the original protein was involved in cellular reproduction, then the entire process of reproduction can be affected by a point mutation.
Sickle- cell anaemia is a disease in which the body fails to produce enough healthy red blood cells. This disease occurs due to point mutation. Point mutation occurs where glutamine (GAG) of the β-globin gets changed into valine (GUG). This change causes the haemoglobin to get a deformed structure due to which it is not able to carry out oxygen.
