How does catalyst work

Answers

Answer 1

Answer: A catalyst works by lowering the activation energy of a reaction - it will provide an alternative pathway of lower energy for the reaction, meaning that reactant molecules have to collide with less energy to react. This increases the proportion of collisions that are successful, and thus increases the rate of reaction

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Fruit flies are commonly used in genetic investigations that focus on traits passed from parents to offspring over several generations. What can you infer is the reason fruit flies are the most commonly used organism for this type of investigation?

Answers

Answer:

The correct answer will be-short life span and rapid reproductive.

Explanation:

Fruit flies or Drosophila melanogaster is a model organism used to study the principles of genetics as:

1. Short life span- they have a very short life span about 40-50 days in which they complete their life cycle.

2. Reproduction- The reproduction in an organism is very rapid that is they reproduce and produce a large number of offsprings in a short period of time.

Thus, scientist uses them to study genetics and observe traits in a small period of time.

Fruit flies reproduce rapidly and they have easily observable traits.

What would happen if CCD (Colony Collapse Disorder) killed all the honey bees?

Answers

The plants remaining would be the only plants then will come as the animals die because they cant eat plants because all the plants are gone then will come us which we will die because there aren't any animals to thrive on

A substance is most likely to diffuse into a cell when(1) it is a large organic food molecule such as protein or starch
(2) it is enclosed in an organelle such as a vacuole
(3) the concentration of the substance is greater outside the cell than inside
(4) the pH of the substance is greater than the pH of the cell

Answers

Answer;

(3) the concentration of the substance is greater outside the cell than inside

Explanation;

-When a substance is of low molecular weight and has a higher concentration of the substance outside the cell as opposed to inside the cell then it is most likely to diffuse into a cell.

-Diffusion involves the movement of molecules from a region of high concentration to a region of low concentration, therefore if molecules are highly concentrated outside the cell then they are likely to move into the cell. Additionally, the size or the molecular weight of the molecules determines whether they will move into to the cell as the cell membrane only allows movement of materials in or out of the cell selectively.

A substance is most likely to diffuse into a cell when (3) the concentration of the substance is greater outside the cell than inside.

Dr. Lombard's research is focused on the capacity of the human mind to store and retrieve information. Her colleague, Dr. Fry, is a clinician who strives to help his clients be "the best that they can be." As a fly on the wall listening to the two psychologists' friendly disputes during coffee breaks, which of these assertions would you most likely expect from Dr. Fry?A. Mental confusion is best compared to a deficiency in short-term memory.
B. A person's basic assumptions about themselves are inevitably false. (wrong)
C. People can't be held responsible for their life choices.
D. If biology is destiny the concept of free will can be only an illusion. (wrong)

Answers

The right answer for the question that is being asked and shown above is that: "A. Mental confusion is best compared to a deficiency in short-term memory. " The assertion that would you most likely expect from Dr. Fry is that A. Mental confusion is best compared to a deficiency in short-term memory.

which technology allows strands of dna to be transferred from the cells of one species into the cells of another species?

Answers

Genetic engineering would be the process of the whole thing. The tool it self would just be known as recombinant DNA technology.

Soil reaction is _______. a. the measure of the acidity or alkalinity of soil
b. the highest amount of cations soil can absorb
c. determined by the types of minerals in the soil
d. the layering of soil into horizons

Answers

A. the measure of the acidity or alkalinity of soil Alkalinity is the name given to the quantitative capacity of an aqueous solution to neutralize an acid.

The correct answer is option A

Soil reaction can be defined as the measure of acidity or alkalinity of soil. The pH of the soil or the reaction of the soil is an measurement or indication of the alkalinity or acidity of the soil. This defines the nature of the soil, whether the soil is acidic or basic in nature. If the amount of hydrogen ions is more then the soil is acidic and if the amount of hydrogen ions are less then the soil is basic.

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The standard deviation of a sample taken from population A is 17.6 for a sample of 25. The standard deviation of a sample taken from population B is 21.2 for a sample of 30. The standard deviation of the sample mean differences is _____. Round your answer to the nearest hundredth.

One limitation to science is that it cannot answer questions about ______ ?