BIOLOGY HIGH SCHOOL

Choose from the following the worst form of marine pollution.A. effects of oil in the oceans
B. slowly degrading chemicals
C. coastal mining booms
D. improperly disposed trash

Answers

Answer 1
Answer: A. effects of oil in the oceans

Oil from oil spills blocks the entry of oxygen in water causing marine species to suffocate and eventually die.

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How does cell technology affect government? 4 New government agencies must be created to fund and regulate each type of technology. 3 A new technology may reduce the amount of money that a hospital needs to operate. 2 Discoveries that are made through cell technology sometimes result in new regulations. 1 New cell technologies might reduce the number of government health-care agencies.

Answers

The correct answer for the question that is being presented above is this one: "2 Discoveries that are made through cell technology sometimes result in new regulations." Cell technology affect government through discoveries that are made through cell technology sometimes result in new regulations.

Answer:

Discoveries that are made through cell technology sometimes result in new regulations.

Explanation:

When adult amphibian skin harbors populations of the bacterium, Janthinobacterium lividum (Jl), chytrid infection seems to be inhibited. Which of the following represents the best experimental design to test whether this inhibition is real?A) Inoculate uninfected amphibians with Jl, and determine whether the amphibians continue to remain uninfected by chytrids.
B) Inoculate infected amphibians with Jl, and determine whether the amphibians recover from infection by chytrids.
C) Take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations.
D) Take infected amphibians and assign them to two populations. Inoculate one population with a high dose of Jl; inoculate the other with a low dose of Jl. Measure the survival frequency in both populations.

Answers

Answer:

C: Take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations.

Explanation:

In scientific investigations, the best way to determine the effect of certain experimental factor on the population of study is to have a baseline for comparison. This is usually referred to as controlled experiment.

In the case of the observation that chytrid infection in amphibians seems to be inhibited by Janthinobacterium lividum, the best way experimental design is to get a population of amphibians suffering from the disease, divide them into two groups and subject them to the same conditions except the introduction of Janthinobacterium lividum to the skin of one of the groups.

A suitable method can thereafter be employed to measure the rate at which infection proceeds in both population. If indeed, the bacterium has the capacity to inhibit the infection, the rate of infection in the group with the bacterium will be significantly less than that of the group without the bacterium.

The correct option is C.

A patient comes into the clinic with a resting heart rate of 80 beats per minute (bpm). The patient's cardiac output was found to be 5.6 liters/minute with an ejection fraction (EF) of 70%. What is the patient's end-systolic volume (ESV in ml)?a) 30 ml
b)70 ml
c)80 ml
Under an electron microscope, the different sarcomere bands of striated muscle can be visualized (I-band, A-band, H-band, and Z-disk) in the relaxed state, after passive stretch, and after contraction. Which sequence of manipulations will lead to increasing A-band width?
a) passive stretch, contracted, relaxed
b)passive stretch, relaxed, contracted
c) none of the above

Answers

The correct answer for the question that is being presented above is this one: "b)70 ml." the patient's end-systolic volume (ESV in ml) is b)70 ml.

The correct answer for the question that is being presented above is this one: "a) passive stretch, contracted, relaxed." The sequence of manipulations will lead to increasing A-band width is that passive stretch, contracted, relaxed.

Describe the details you were able to see when viewing specimens with scanning electron microscope

Answers

Answer:

The scanning electron microscope allows the elaboration of an image in which the surface characteristics of the sample are reflected, thus providing sufficient information on the shapes, textures, and chemical composition of the constituents.

Explanation:

The scanning electron microscope uses electrons instead of light for imaging.

To achieve this, the team has a device that produces an electron beam that allows the entire sample to be illuminated and, through different detectors, the electrons that are produced from the interaction with the surface of the sample are later collected.
The scanning electro microscopesallows you to view three dimensional picture of the sample.You could see all the different outer structures on the base of each sample

What is a substrate?

Answers


Its a surface on which an organism grows or is attached.

I hope this helps!
the substance an enzyme acts on

A new highly nutritious crop is going to be planted in an area where it has never been planted before. Which is the most likely outcome of such an event?

Answers

It will threaten local biodiversity. 

The new plants planted in an area where they have never been planted before are called introduced species. They can greatly affect local ecosystem. In the new area, they have no natural predators and are able to spread. If they spread beyond the area they are planted, they become invasive species which can overgrow native biotopes and are a great threat to the local biodiversity. This could lead to the extinction of some native species.

Answer:

negative as it threatens local biodiversity

Explanation:
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A researcher recorded that a chemical reaction required 2.90 gal water and raised the temperature of the reaction vessel by 57 F. Convert the researcher's volume measurement to the SL units of literThere are 3.875 L in 1 gallonA. 11.0 LB. 8.9 LC. 9.11 LD. 11 L
Which of the following is caused by the modification of density-independent factors?
Bone marrow replacement is the method of treatment for individuals with a rare immune system disorder in which the body is unable to produce an immune response called: