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2 years ago

Which is a function of the cardiovascular system?

1 answer:

7 0

C? the cardiovascular system transports nutrients, oxygen, and hormones to cells throughout the body but it also removes metabolic waste.

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Can someone please answer this question

dexar [7]

Answer:

D) Can simple organic molecules form spontaneously in an oxygen-free atmosphere?

Explanation:

7 0

3 years ago

Group the following into the appropriate range of measurement.

Vesna [10]

Answer:

Hydrogen atom & glucose molecule --- atomic.

Herpesvirus, DNA --- ultramicroscopic.

Protozoan, Rickettsia - microscopic.

Roundworm and algae --- macroscopic

Explanation:

1) Hydrogen atom & glucose molecule --- atomic.

The atomic size level, which interacts with atoms as well as small molecules, is much lower than the ultramicroscopic range.

2) Herpesvirus, DNA --- ultramicroscopic.

Ultramicroscopic particles are very tiny structures that cannot be seen using a conventional optical microscope, necessitating the use of an electron microscope. Viruses and DNA falls into this group since they are much smaller than tiny species like bacteria.

3) Protozoan, Rickettsia - microscopic.

Microscopic species are much smaller than macroscopic organisms because they cannot be observed by the naked human eye and must be viewed through a microscope. The size range for microscopic particles is $( 10^3 \ \ to \ \ 10^{10})$ , which contains protozoans and Rickettsia (a gram-negative, non-motile bacteria genus).

4) Roundworm and algae --- macroscopic

Naked eyes can see macroscopic organisms; for example, several types of circular worms and algae can be seen by them.

7 0

2 years ago

What happens when subduction occurs?

Rus_ich [418]

Its where one plate moves under another and is forced or sinks due to gravity into the mantle. This is where you get your sinkholes from.

7 0

3 years ago

What is the relationship between gaps and fossils?To find fossil evidence to fill the largest remaining gap in whale evolution,

Over [174]

Answer:

To find the fossil evidence to fill the largest remaining gap in whale evolution, you would search age sediment of 37MYA-46MYA.

Explanation:

Fossils are the dead remains of living organisms. The gaps between the fossils usually point out the uncertainties in the understanding of precisely how species are evolved. However, the gaps do not indicate the weakness in the theory of evolution itself. There are many gaps in the fossil records that continue to shrink with time as new fossils are discovered. The gaps are contingent features of fossil records.

Secondly, to discover the fossil evidence to fill the largest remaining gap in the evolution of whale, you would search the age sediment of 37MYA-46MYA.

7 0

3 years ago

The A260/A280 ratio method estimates protein ________________ by measuring the absorbance maximum at 280nm caused by the amino a

natita [175]

Answer:

<h2>Purity</h2><h2>Aromatic rings, peptide bonds, primary structure, secondary structure, and tertiary structure,</h2><h2>Nucleic acid,</h2><h2>260nm.</h2><h2 />

Explanation:

The A260/A280 ratio method estimates protein purity by measuring the absorbance maximum at 280nm caused by the amino acids aromatic rings, peptide bonds, primary structure, secondary structure, and tertiary structure. Since nucleic acid also absorbs in the UV range, we can correct for this contaminate by measuring the absorbance maximum at 260nm and using the following equation.

7 0

2 years ago