BIOLOGY HIGH SCHOOL

What is the unit cost if a dozen eggs cost $1.35?A) $0.11
B) $0.13
C) $1.23
D) $4.29

Answers

Answer 1

Answer: total eggs=12
dozen eggs cost =1.35 dollars
one egg =12/1.35
=0.11 dollars

Answer 2

Answer:

The cost of an egg is $0.11

Step-by-step explanation:

Given : The cost of one dozen of eggs is $ 1.35

We have to find the cost of one egg.

We know, one dozen has 12 units

Thus, One dozen of eggs contain 12 eggs

So cost of 12 eggs is $ 1.35

So to find the cost of one egg divide the cost by 12.

We get,

1 egg =

Thus, The cost of an egg is $0.11

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An example of a monocot is a _____ .a. fern. b. pine tree. c. moss. d. lily.
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The cell membrane of a red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Since other substances are blocked from coming in, this membrane is called A. perforated. B. semi-permeable. C. non-conductive. D. permeable.

Assume that you transform bacteria with a plasmid containing an ampicillin-resistance gene. Instead of directly plating the transformed population as you did in this lab, you set up two liquid cultures of them, one that contains ampicillin and one that does not. You will then assay these cultures on plates at two different times: immediately after you set up the cultures, and then again after the bacteria have been in culture for an extended period. The assays will demonstrate the number of ampicillin-resistant vs. ampicillin-sensitive culture bacteria in each culture at each time. To perform each of the two assays, you prepare serial dilutions of the two cultures and plate them onto LB plates with and without ampicillin (the dilution) is simply to ensure that you will get some plates on which you can distinguish separate colonies).Describe what you expect to observe in the initial assay and in the second assay. What, if any, differences might you expect in terms of the ratios of ampicillin-resistant and nonresistant bacteria?

Answers

In the initial assay with ampicillin, there will still be, although in a smaller number, nonresistant bacteria that have survived incubation. After an extended period, ampicillin will kill all nonresistant bacteria and in the second assay, only ampicillin-resistant bacteria will survive.

Granular material visible within the nucleus

Answers

The granular material is likely chromatin, the threadlike form of DNA, before it condenses to become chromosomes.

Final answer:

The 'granular material' visible within nucleus in a cell typically refers to nucleoli or chromatin. Nucleoli produce ribosomes, which are crucial for protein synthesis. Chromatin is a complex of DNA and protein that forms visible chromosomes during cell division.

Explanation:

In Biology, the reference to granular material visible within the nucleus usually implies to nucleoli or chromatin. The Nucleolus is a small dense spherical structure in the nucleus of a cell during interphase. It is composed of proteins and nucleic acids, and its main function is to produce ribosomes, which then move out of the nucleus and take positions on the rough endoplasmic reticulum where they are essential in protein synthesis. On the other hand, Chromatin is a complex of DNA and protein found within the nucleoplasm. They take the form of loose strands during interphase but condense to form visible chromosomes during cell division. The granules you observe are probably either of these two structures, depending on the stage of the cell.

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The most easily polluted groundwater reservoirs are A. sewage plant reservoirs.
B. water-table aquifers.
C. salt reservoirs.
D. artesian wells.

Answers

The right option is B. water-table aquifers

Water-table aquifers are underground layer of water whose water table is at atmospheric pressure and is not below a confining layer. Water-table aquifers are susceptible to drought conditions and pollutants because they are usually closer to the earth's surface. Water-table aquifers can be polluted by naturally occurring mineral and metallic deposits in rock and soil, manufactured chemicals such as fertilizers, and dumps or landfills. When ground water pollutants reach a water-table aquifer, they make the water unclean and unusable for decades.

Water-table aquifers

Further Explanation:

Water-table aquifers are more susceptible to pollution. The water table is the specific part of groundwater, whereas aquifers are the entire portion of groundwater of an area. Aquifers are a large storehouse of water-bearing rocks, gravel, sand, and silt. The water content of the aquifers keeps on changing with seasons. Three different types of water aquifers are present, which are confined, unconfined, and semi-confined.

The groundwater resources are more prone to pollution due to agricultural waste, landfills, hazardous chemicals, and atmospheric pollutants. Human activities are responsible for groundwater pollution. The chemicals and toxic waste can be accidentally or intentionally released in the groundwater. The porosity and permeability of soil allow the contaminants to reach with an ease to aquifers. The pollutants can move to the underground through the root system and animal burrows also. If any river or stream is present nearby the contaminated groundwater, then the risk of river contamination is very high. Some naturally occurring substances like decaying organic matter moves towards the groundwater and change the taste, color, and odor of the water.

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Answer details:

Grade: High school

Subject: Biology

Chapter: Water pollution

Keywords:

Groundwater, pollutants, toxic, human activities, root system, aquifers, confined, semi-confined, unconfined, contamination.

Which of the following plant-cell organelle supports and maintains the cell's shape and protects the cell from damage? A. cell membrane B. cell wall C. chloroplast. D. vacuole

Answers

Answer;

-Cell wall

Explanation;

-The cell wall is thick and fibrous and provides a barrier between the cell and its external environment.

-The plant cell wall is composed of cellulose. Cellulose is a structural carbohydrate and is considered a complex sugar because it is used in both protection and structure. The plant cell wall consists of three layers. Each layer has its own unique structure and function.

-A major role of the cell wall is to form a framework for the cell to prevent over expansion. Cellulose fibers, structural proteins, and other polysaccharides help to maintain the shape and form of the cell. Additional functions of the cell wall include: Support: The cell wall provides mechanical strength and support.

Cell wall supports and maintains the cell's shape and protects the cell from damage (option B)'

What is Cell wall?

The plant cell is protected by a layer called the cell wall, which encloses the cell membrane. This rigid structure, composed of cellulose offers both support and safeguarding functions, for the cell. Additionally the cell wall plays a role, in preserving the cells shape and preventing it from rupturing when exposed to pressure.

The cell membrane on the hand forms an outer layer encompassing every type of cell.

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Name five substances that are transported in blood plasma

Answers

"Hormones".

"nutrients" such as "water", glucose , amino "acids", "minerals" and "vitamins".

Water substances, such as "carbon dioxide" and urea.

I hope this helps.
I listed 7 hope that's ok there in "parentheses".

animal research is critically important for the study of variables that can't be _____ ethically in human subjects.

Answers

animal research is critically important for the study of variables that can't be manipulated ethically in human subjects.

Final answer:

Animal research is critically important for studying variables that can't be ethically tested in human subjects. Ethical regulations ensure the humane treatment of animal subjects and the minimization of pain and distress. Animal research is a privilege granted by society to researchers.

Explanation:

Animal research is critically important for the study of variables that can't be tested ethically in human subjects. Ethical considerations have necessitated strict regulations on animal research, such as the approval of an IACUC and regular inspections of animal facilities. The use of animals in research is a privilege granted by society to researchers, and efforts are made to minimize pain and distress experienced by animal subjects.