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3 years ago

What do the four R’s mean

Biology

1 answer:

saveliy_v [14]3 years ago

7 0

Answer:

Reduce, Reuse, Recycle and Recover are the four R’s.

REDUCE: This means to use the environmental resources in a sustainable way and prevent waste.

REUSE: This means we can use the same thing over again.

RECYCLE: This means things are processed and can get turned into some other product that they can be used again.

RECOVER: This means a safe and eco-friendly alternative should be used in place of a thing.

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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

Bess [88]

A. 11.0 L is the researcher's volume measurement to the SL units of liter

Explanation:

Given that a researcher recorded that the chemical reaction has water = 2.90 gallon.

We have to convert the researcher's volume into the SL units of liter.

So, we know that 1 gallon = 3.875 liters.

Then we have to convert 2.90 gallons of water in to liters.

Then , volume in L = $(volume\ in \ gal) \times (3.875 L/1 gal)$ = $(2.90) \times (3.875L/1 gal)$

= $11.0L$

Then the required volume in $L= 11.0L$ 

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3 years ago

Difference between optometrist and ophthalmologist

Neporo4naja [7]

Answer:

What Is the Difference Between an Optometrist and an Ophthalmologist?

1. Optometrists- Optometrists examine, diagnose, treat, and manage diseases and disorders of the eye. ...

2. Ophthalmologists- Ophthalmologists are medical doctors (M.D) who diagnose and treat all eye diseases, perform eye surgery, and prescribe eyeglasses and contact lenses.

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3 years ago

What are the mechanisms by which aneuploidy and polyploidy are caused? What are the mechanisms by which aneuploidy and polyploid

sleet_krkn [62]

The correct answer is:

The principal cause of aneuploidy is chromosome nondisjunction during mitosis or meiosis. Polyploidy in nature can result either from the duplication of euploid chromosome sets from a single species or from the combining of chromosome sets from different species.

Aneuploidy is a phenomenon when there is the presence of an abnormal number of chromosomes in a cell (an extra or missing chromosome). Usually it appears as a result of improper cell division (chromosomes don’t separate) and it can cause many genetic disorders.

Polyploidy refers to a state when there are more than two sets of chromosomes (one from mother one from father). Triploid (three sets of chromosomes) and tetraploid (four sets of chromosomes) chromosomes are examples of polyploidy. This phenomenon is most common in plants.

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3 years ago

The junction where one neuron can transfer an impulse to another structure is called a(n)

garri49 [273]

Synapse.

Hope this helps!

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3 years ago

What are the 3? Phasers off cellular respiration

ANTONII [103]

Glycolysis, citric acid cycle, electron transport chain

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3 years ago