Answer: Surgical Iridectomy or coredectomy is the excision of iris for the treatment of glaucoma.
Explanation:
Glaucoma is a desease that destroy the optic nerve and can cause blindness. It can best be treated by surgical iridectomy. Glaucoma is caused when the fluid inside the eye(aqueous humor) flow out through a channel and continuous build up can cause blockage of the channel
Surgical Iridectomy is the removal of part of the iris in order to treat glaucoma. This is normally done for close angle glaucoma.
Answer:
Different individuals within a species have variation because they may express
different alleles for the same traits
Answer: True
Explanation:
Biology itself is the study of living things and their vital processes that deals with all the physicochemical aspects of life.
Biologists attempt in all way to describe something completely in detailed. They try to explain reasons and how organism behave how the behave.
Using descriptive science biologists involve descriptive research; that is, observing, recording, describing, and classifying biological phenomena.
Answer:
Hydrogen bond: It is a type of bond which exist between hydrogen atom and other atom having high value of electronegativity. Those atoms having high electronegativity values has the capability to attract the shared pair of electron towards itself. Hydrogen atom have very low value of electronegativity, so the shared pair of electron goes farther from it and nearer to high electronegative atom such as oxygen in water molecule. This bond is very weak than covalent bond.
It is not true bond due to weak force of attraction between atoms.
Answer:
When first used in medicine in the 1940s, penicillin was uniformly effective in killing the bacterium Staphylococcus aureus. Today, the <u>Darwinian selection</u> has led to an increase in antibiotic-resistant alleles, and humans are increasingly at risk from untreatable Staphylococcus aureus infections.
Explanation:
Those bacterias which were affected by the penicillin were filtered off from the environment since the offspring of those susceptible bacterias were decrease by time until total extinction.
But by the natural mutation of bacterias, some bacterias can originate a offspring of bacterias which were capable of resist the action of an antibiotic. Those genes could also be carried out by a plasmid conjugation creating new colonies which are resistant to the penicillin.