Science basic questions and answers

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Science basic questions and answers
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Microscope

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1 A plant which grow on another plant is called what......................?
2 ............. Is the time taken for the intensity of radiation to reduce to half ?
3 type of reaction between acid and base to form salt and water is referred to as---------------?

BIO 1202 TUTORIAL QUESTIONS 2Completion: Fill in the blank spaces with the appropriate answers. 1. ______________ is the smallest unit of classification.
2. ______________is the scientist that developed the modern Taxonomy. 3. In Biology, the practice of classifying organisms is called___________. 4. Modern Taxonomy uses as a method of naming organisms. 5. Taxonomy and Binomial nomenclature helps in eliminating problems such as______________&______________, caused by common names. 6. To distinguish different levels of similarity, each classifying group, called ______________ is subdivided into other groups.
7. There are________ levels of classification at this time.
8. _____________ encompasses most of the world visible living things.
9. _____________ kingdom, have naked DNA with absence of membrane bound organelles.
10. One of the unique characteristics of _______________ is that they do not have lungs for respiration.
11. Hermaphroditism is a condition where ___________ & ____________ produced by the same individual.
12. ____________ are commonly called flatworms.
13. Ascaris and Ancylostoma are good examples of ____________________
14. The largest phylum of the animal kingdom is ________________________.
15. In Arthropods, excretion takes place through ________________________.
16. In most Pisces, the body is covered with _____________________ that help prevent decay from water.
17. Toad, frog and salamander are good example of ______________________.
18. In _________________ phylum, the forelimbs are modified as wings for flight.
19. The unique feature of the class mammalia is the presence of ________________, by which the young ones are nourished.

microbiology is the branch of biology that deal with study of microscopic organisms

microscopic organisms or microbes are organisms which can not be seen with our naked eyes except with the aid of microscope

five group of microorganisms
1- virus
2- bacteria
3- protozoa
4- fungi
5- algae

They are found every where in nature,
in soil, surface of an object, and within living organisms where they are able to invade a living cells

Culture: is the growing of microorganisms in a special medium in laboratory.
In other to grow a microorganisms we have to use a procedure that will not introduce microbial growth from our surroundings, such as air, clothes, apparatus, water, etc.

Bacteria, fungi, algae are easy to grow in a petri dish or test tube.
Even living tissue and cells of multicellular organisms can be culture for study in appropriate media- a technique know as tissue culture.

unfortunately virus can only be grow and multiply inside living organisms so they can not be grow like other microorganisms.
many disease cause organisms are difficult to grow

important of tissue culture

1- hereditary mechanisms
2- growth and development
3- details of cells structure and metabolism
4- nature of specific inherited disorders

use of tissue culture

1- for production of vaccine against viral disease
2- to diagnosis inherited disorders
3- for the culture of virus

Aseptic technique

these include:
1-sterilize all glass that will contact with specimen
2-wipe the work area with clothes or cotton wool socked in a strong disinfectant
3- flaming all equipments using for transfer of microorganisms just before used.

How to identify a microorganisms.

i- observing the form and structure of microorganisms
ii- characteristics of the colonies form
iii- oxygen requirements of microorganisms especially bacteria
those that requires oxygen are called aerobic bacteria and those that can grow in absence of oxygen are called obligated anaerobic bacteria

Combination of microorganisms, urine, involuntary actions

Vitamins

Skeleton system