This is a condition where a person can see only distant objects clearly as near objects appear blur.. This is because the image of near objects are formed behind the retina. It often also referred to as hyperopia or hypermetropia.

Notice the yellow beam forming behind the eye shown in the diagram above. generally, this can be corrected by wearing a convex lens. Nonetheless, if you recently noticed yours, it might be because of offer stressing on near objects. 

Mammology is the branch of biology that studies organisms that put yo birth without laying eggs. In essence, mammals are organisms that put to birth without laying eggs.

It is the study of the measurements, properties and relationships of quantities and sets using numbers and symbols. Mathematics is this applicable in every domain of life and physics.

Matter is anything that has mass and occupies space. Technically, if something exist, then it is matter because if it exist it must have a size which takes up space and a mass even if it's too small.

Microbiology is a branch of biology that studies microorganisms. A person who studies microbiology is called a microbiologist.

A monohybrid cross is a genetic cross between two individuals in which only one character or trait is studied. It can also be defined as a cross involving only one characteristic e.g fur length, fur colour, eye colour, etc.

A mutation is any natural or induced change in the genetic make-up of an organism. It could be further defines as, the changes in the amount, arrangement or structure of the DNA of an organism.

There exist generally 2 types of mutation according the cell which is mutating: germ cell mutation and somatic mutation. There also exist 2 others for how the mutation is taking place: gene mutation and chromosomal mutation. No matter be the case, the bottom line is the fact that, any change in the genetic make-up of an organism is a mutation.

An observation is a careful examination of events or objects around us.

In an experiment, an observation can be defined as any noticeable occurence in the course of the experiment. Observations in an experiment are very important as they are the bed rock of hypothesis, laws and theories.

This is the branch of biology that studies parasites. 

Etymologically, parasitology can be split into 'parasit" which of course stands for parasite and "logy" for science or study. Parasitology is therefore  the science of parasites.

The periodic table is a table of chemical elements arranged in order of periodicity in vertical groups and horizontal periods.

The modern periodic table was founded by Dimitri Mendeleev. He succeded in this after many have tried like Döbereiner and John Newlands.

Physics is the study of matter and energy in all their forms. This means there is a close relationship between physics and chemistry. The difference is in the fact that, chemistry studies the constituents of matter while physics studies the behaviour of matter vis a vis certain conditions.

The progenoate is said to be the very first cell to have existed or appeared. This completes the cell theory that cells come from other cells.

The progenoate is said to have existed about 3.5 billion years ago while the first unicellular and multicellular eukaryotes appeared about 1.4 and 0.7 billion years ago respectively.