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mart [117]
3 years ago
11

amie is performing an experiment that involves chemicals, test tubes, and burners as part of her biotechnology workshop. Which o

f Jamie's actions below is NOT appropriate when working in a lab?
Biology
1 answer:
Bumek [7]3 years ago
6 0
Well it depends what are the actions listed below
You might be interested in
What organelles help the nucleus do its job?
shepuryov [24]
Endoplasmic Reticulum. -- Transport System. Golgi Apparatus -- Delivery System. Lysosomes - Intracellular Digestion Centers. Ribosomes - Sites of Protein Synthesis. ENERGY RELATED ORGANELLES. Cytoskeleton - Support System. Related to Movement.
6 0
3 years ago
If you want to selectively label RNA being synthesized by cells(and not DNA) what radioactive compound would you add to the medi
romanna [79]

The right answer is E.

Uracil is a nitrogenous base (pyrimidine) specific for RNA. The nucleoide of uracil is called uridine and nucleotide is called uridine monophosphate or uridylate. In the DNA, there is thymine instead of uracil.

So if we mark the uracils, only the RNA will be marked. The DNA will not be given that there is no uracil in it.

6 0
3 years ago
You are a molecule of phosphorus. Choose a starting point in the process you would go through to move through the entire cycle.
noname [10]

Answer:

First I'd be found in rocks. Erosion would wash me into the soil. Then I'd be absorbed by plants, fungi or microorganisms so they can grow. Animals would get me by eating the plants or drinking the water that eroded the rock. The plants and animals die and I'm absorbed back into the soil.

Explanation:

Phosphorus Cycle Steps

The phosphorus cycle is a slow process, which involves five key steps.

Weathering

Since the main source of phosphorus is found in rocks, the first step of the phosphorus cycle involves the extraction of phosphorus from the rocks by weathering. Weather events, such as rain and other sources of erosion, result in phosphorus being washed into the soil.

Absorption by Plants and Animals

Once in the soil, plants, fungi, and microorganisms are able to absorb phosphorus and grow. In addition, phosphorus can also be washed into the local water systems. Plants can also directly absorb phosphorus from the water and grow. In addition to plants, animals also obtain phosphorus from drinking water and eating plants.

Return to the Environment via Decomposition

When plants and animals die, decomposition results in the return of phosphorus back to the environment via the water or soil.  

Plants and animals in these environments can then use this phosphorus, and step 2 of the cycle is repeated.

Human Impact on the Phosphorus Cycle

Humans have had a significant impact on the phosphorus cycle due to a variety of human activities, such as the use of fertilizer, the distribution of food products, and artificial eutrophication. Fertilizers containing phosphorus add to the phosphorus levels in the soil and are particularly detrimental when such products are washed into local aquatic ecosystems. When phosphorus is added to waters at a rate typically achieved by natural processes, it is referred to as natural eutrophication. A natural supply of phosphorus over time provides nutrients to the water and serves to increase the productivity of that particular ecosystem. However, when foods are shipped from farms to cities, the substantial levels of Phosphorus that is drained into the water systems is called artificial or anthropogenic eutrophication. When levels of phosphorus are too high, the overabundance of plant nutrients serves to drive the excessive growth of algae. However, these algae die or form algae blooms, which are toxic to the plants and animals in the ecosystem. Thus, human activities serve to harm aquatic ecosystems, whenever excess amounts of phosphorus are leached into the water.

8 0
3 years ago
When parallel light rays exit a concave lens, the light rays diverge. converge. come together. remain parallel.
Temka [501]

When parallel light rays exit a concave lens the light rays diverge. Option A. This is further explained below.

<h3>What is ray divergence?</h3>

Generally, ray divergence is simply defined as when light rays begin at a point and diverge,

In conclusion, when light rays begin at a point and spread, it is called ray divergence.

Read more about Light

brainly.com/question/25770676

3 0
2 years ago
Rigor mortis occurs because ________.
Kamila [148]

Answer:

No ATP is available to release attached actin and myosin molecules.

Explanation:

Two to six hours later after death, all skeletal muscles of the body become rigid and stiff. This situation is defined as Rigor mortis. It occurs from the lack of ATP along with the production of lactic acid. When breathing stopped permanently in the body, oxygen level also reduced; that’s why body muscles cannot go for any aerobic respiration to produce any ATP. 

As we know already, during every muscle construction, ATP needs to break the cross-bridge between Myosin and Actin. So if there is no ATP produced in the body, separation of Myosin molecules from Actin molecules cannot happen anymore. This situation leads for rigor mortis.

6 0
3 years ago
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