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4 years ago

Why does the stain move across the slide when the paper towel is applied?

2 answers:

8 0

Water based liquids are polar which means the hydrogen and oxygen molecules are slightly positive or negative. One of the causes of being a polar molecule is that the water based liquid is cohesive, this allows the liquid to stick to itself. Along with cohesion is adhesion which allows it to stick to other substances. The liquid sticks to the paper towel and pulls itself along as if it were tied together until the full area is absorbed. But don’t quote me on it ;).

jeka944 years ago

3 0

Not very sure, but this is probably because the stain is much more dried up and already sticked onto the surface, rather than the paper towel that simple brushed by it for the couple of seconds used in attempt to wipe the stain.

Please mark me brainliest so I can become a Virutoso, thank you! :)

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If an H is for tall trait which is dominant and h is the recessive trait for short,

topjm [15]

Answer:

The cross that guarantees a height trait ratio in the offspring of 1 : 1 high/low is Hh X hh (option C).

Explanation:

For a characteristic such as size, where tall (H) is the dominant trait and short (h) is the recessive, the crossing of a tall heterozygous (Hh) individual with a short one will have a probability that half of the offspring will be tall and the other half short.

This can be demonstrated with a Punnett square:

Cross Hh X hh

Alleles H h

h Hh hh

Based on this result, half of the offspring will be tall, with genotype Hh, and the other half short, with genotype hh, which corresponds to a tall : short ratio of 1 : 1.

In the other options is not possible to obtain this result:

A) HH Xhh = 100% Hh.

B) hh X hh = 100% hh.

D) Hh X Hh = 50% Hh, 25% HH and 25% hh.

3 0

3 years ago

Which of the following is NOT a type of angiosperm? dicots tricots monocots none of the above

grandymaker [24]

Tricots are not a type of angiosperm.

5 0

3 years ago

Read 2 more answers

The liver is an example of organ of the digestive system. Which of the following statements describes the general function of th

nikklg [1K]

Answer:

Secretes enzymes and other liquids that aid in the digestion and processing of food

Explanation:

The liver is a large organ in the body, if not the largest. It possess a red-purple color and constitutes a part of the digestive system. The liver carry out many functions in the human body; inclusive of digestive function. Although it is not a main digestive organ.

During digestion, the liver is responsible for processing of absorbed nutrients by releasing certain hormones and chemicals like bile, which aids in digestion of fat. This is the reason the liver is considered a "gland"

7 0

3 years ago

The purpose of the phospholipid bilayer.

SashulF [63]

Answer:

Explanation:

It maintains the integrity of the cardiomyocyte as it turns a permeability barrier that provides a physical interface between the inside and outside of the myocte

4 0

3 years ago

The ATP yield for a molecule depends on where it enters glycolysis or the citric acid cycle. The yield can be compared to the ne

Andru [333]

Answer:

a) The net ATP yield from fructose 1,6‑bisphosphate is 32 ATP

b) The net ATP yield from galactose is 30 ATP

c) The net ATP yield from dihydroxyacetone phosphate is 16 ATP

d) The net ATP yield from pyruvate is 12.5 ATP

e) The net ATP yield from lactate is 14 ATP

f) The net ATP yield from phosphoenolpyruvate is 13.5 ATP

Explanation:

a) In this case, 2 ATP molecules are not used for the phosphorylation of glucose for the production of fructose bisphosphate 1.6, thus, the net ATP yield is 32 ATP.

b) Galactose is converted to glucose-1-phosphate through reactions that lead to phosphorylation. Glucose-1-phosphate is transformed into glucose-6-phosphate by the enzyme phosphoglucomutase. Later it is used in glycolysis, thus, the net ATP yield is 30 ATP.

c) The fructose 1,6 bisphosphate is decomposed in glyceraldehyde-3-phosphate and dihydroxyacetone phosphate. Dihydroxyacetone phosphate is isomerized to glyceraldehyde -3-phosphate. ATP performance is (2.5+2.5+11) = 16 ATP

d) Pyruvate is decarboxylated oxidatively to produce acetyl-CoA. ATP yields are:

Glycolysis = 0

Oxidative decarboxylation = 2.5 ATP

TCA cycle = 10 ATP

The net yield is 2.5 + 10 = 12.5 ATP

e) Lactate is oxidized to pyruvate by the enzyme lactate dehydrogenase with a reduction of NAD. Pyruvate is brought into the mitochondria, where it is decarboxylated oxidatively to produce acetyl-CoA. If 1.5 ATP is assumed for cytosolic NADH, therefore 1.5 is produced. So, the net yield is: 12.5 + 1.5 = 14

f) Phosphoenolpyruvate is converted to pyruvate by ATP production through phosphorylation. ATP yield is as follows:

Glycolysis = 1

Oxidative decarboxylation = 2.5 ATP

TCA cycle = 10 ATP

The net yield is 1 + 2.5 + 10 = 13.5 ATP

6 0

3 years ago