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A. 54.5 x 102 kg
B. 5.45 10-3 kg
C. 5.45 103 kg
D. 545 x 103 kg
Answer:
C. 5.45 × 10^3 kg
Explanation:
Scientific notation is a way of writing large or small numbers in a decimal form also called exponential form i.e. expressed in terms of power of tens.
This simple method can ve followed when converting a number to scientific notation. We say; a × 10^x
a is the decimal number expressed in the power of tens
x is power of ten
According to the question, a male African elephant weighs 5450 kg.
To convert 5450 to scientific notation, we first of all move the decimal points to the left until we have only one number leftward
N.B: the decision point in any whole number is in front of the last number going rightwards.
We have, 5450 = 5.450
Next, we count how many times the decimal point was moved leftwards. In this case, it was moved three (3) times. Hence, the power of ten (x) is 3.
Because we moved leftwards, the power of ten will be a positive number. We have;
5.450 × 10^3 kg.
Answer:
The vortex created is a similar form of kinetic force to stirring, but minus a component that protrudes into the sample container. A vortex is the preferred choice for a host of microbiology and life science applications with sensitive samples or high throughput operations. A typical stirrer faces several limitations – for instance, it can only mix a single sample container at a time.
Answer:
Vortex instrument is used to suspend cells that is, it is a simple device used to mix small vials of liquid in laboratories.
B. artificial selection.
C. natural selection.
D. homologous and analogous structures
The answer is B. artificial selection. Artificial selection is . a process in the breeding of animals and in the cultivation of plants by which the breeder chooses to perpetuate only forms that have certain desirable inheritable characteristics (such as, in this case, cows that produce the most milk).