1. Which variable should be changed in an experiment to test how much sodium bicarbonate will dissolve in water at 25°C?

In an experiment, a scientist adds half a cup of fertilizer to pond “A” and zero fertilizer to pond “B” to compare the amount of

Anna71 [15]

A. dependent variable

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3 years ago

Experiments sometimes include measuring the variable/concept twice. this technique is known as a _____. sample and population pr

Ostrovityanka [42]

The correct answer is pretest and posttest .

A pretest/posttest experiment is an experiment that includes double measurements at multiple points in time. In this kind of test, measurements (measurement of dependent variable) are taken both before and after a treatment.

7 0

3 years ago

Use this information to answer questions 6 - 11. Your original population of

grigory [225]

Answer:

1. How did the tidal wave affect the predicted frequencies of the alleles in the population?

No changes

2. What is the frequency of the recessive allele?

q= 0.6

Explanation:

If we assume that all individuals were equally likely to be wiped out, that means the frequency/ratio of the gene and genotype of the population will not change. The tidal wave killing 100 out of 200, so it simply makes the population become half of it used to be.

If the population at equilibrium, we can use the Hardy-Weinberg formula to find out the expected frequency of the dominant and recessive alleles. There are 36 homozygous recessives out of 100, so the frequency of the recessive allele will be:

q^2 = 36/100

q= √36/100= 6/10= 0.6

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3 years ago

How are the equator and the prime meridian used on maps ???

jarptica [38.1K]

The Prime Meridian separates the Western and Eastern Hemispheres . The Equator separates the Northern

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3 years ago

Read 2 more answers

6. What is the relationship between an organism's DNA and protein specificity?

Svetach [21]

Answer:

The relationship between an organism's DNA and protein specificity is that DNA determines the amino acid sequence of each protein (option D).

Explanation:

Each organism's DNA molecule is formed by a specific sequence of nitrogenous bases that not only determine the amino acids that a synthesized protein will have, but also the order in which these amino acids will form the protein structure.

The steps in which this occurs can be summarized as follows:

The sequence of nitrogenous bases of a DNA strand is transcribed into the mRNA, which will go into the cytoplasm.
The sequence of bases in the mRNA is organized into triplets of bases, called codons, each of which encodes a specific amino acid.
During translation, each codon will indicate the amino acid that will be coupled to a protein molecule in a specific order.

According to this, the DNA determines the amino acids sequence that will be in a specific protein molecule.

7 0

3 years ago