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2 years ago

A scientist must always try to avoid _____________ in scientific experiments.

1 answer:

8 0

A scientist must always try to avoid bias in scientific experiments. It is important for scientist to avoid leaning into their bias when trying to confirm their hypothesis. As much as possible the scientist should be able to follow the scientific method to avoid bias.

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A rock sample has a mass of 16 grams and a volume of 8 cubic centimeters. When the rock is cut in half, what is the volume and d

spayn [35]

Answer:

Volume= 4 cm³

Density= 2 g/cm³

Explanation:

We have the following data:

volume= V= 8 cm³

mass= m= 16 g

The density is the mass per volume of a substance, so the density of the rock is:

density= d= 16 g/8 cm³= 2 g/cm³

When we cut the rock in half, we have a half volume and a half mass:

V= 8 cm³/2= 4 cm³

m= 16 g/2= 8 g

But the density is not altered because it is an intrisic property - it does not change with the amount of subtance. Thus, the density of a half rock is:

d = m/V= 8 g/4 cm³= 2 g/cm³

6 0

2 years ago

When rainwater attacks formations of limestone, the minerals dissolve and wash away with the mildly acid rainwater. This is an e

Korvikt [17]

This is an example of dissolution of carbonates.

When carbon combines with minerals, it dissolves carbon. This transforms minerals that contain calcium, magnesium, potassium, and sodium. When rainwater attacks formations of limestone the constituent minerals dissolve and wash away with mildly acidic rainwater.

4 0

2 years ago

Photosynthesis is important to living organisms because it is<br><br>

saw5 [17]

Answer:

Green plants and trees use photosynthesis to make food from sunlight, carbon dioxide and water in the atmosphere: It is their primary source of energy. The importance of photosynthesis in our life is the oxygen it produces. Without photosynthesis there would be little to no oxygen on the planet.

Explanation:

6 0

2 years ago

Species 1 is described as 2n = 8 and has chromosome composition BBDDEEHH.

egoroff_w [7]

Answer:

a. Trisomic

Explanation:

A trisomy is a genomic phenomenon whereby a particular chromosome is present in three copies. In this case, the trisomy involves the chromosome P, being this species a tetraploid with 5 pairs of homologous chromosomes (2n = 10). In humans, the trisomy for chromosome 21 is one of the most common types of aneuploidies that lead to the Down syndrome by producing alterations in gene expression patterns that are associated with changes in the phenotype

7 0

2 years ago

Gel analysis of fragments in step 6 shows that even though the undigested DNA and DNA digested with HindIII are both 1000 bp, th

Soloha48 [4]

Answer:

Size of the band varied

Explanation:

In the given question, the options are not provided but based on the information provided in the question, it can be predicted.

When the DNA was digested by the HindIII, then the length of the digest came about 1000 bp and the undigested DNA was also found 1000 bp.

When both the bands were analysed by Gel electrophoresis then the bands do not run to the same distance therefore this shows that the size of both the bands was not equal and their size varied.

Thus, the size of the band varied is correct.

6 0

2 years ago