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Alexxandr [17]
2 years ago
14

1.The digestive system relies on the______system to deliver the nutrients to the entire body of the organism.

Biology
1 answer:
lutik1710 [3]2 years ago
8 0

Answer:

1_circulatory

2_circulatory

3_respiratory

4_excratory

5_respiratory

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To solve a problem using the equation for Kepler’s third law, Enrico must convert the average distance of Mars from the Sun from
vovikov84 [41]

Answer:Enrico must multiply the distance of mars from sun (meters) with the 6.6844\times 10^{-12} to convert the distance in astronomical units.

Explanation:

1 astronomical unit  = 1.496\times 10^{11} m

1m=\frac{1}{1.496\times 10^{11} } AU=6.6844\times 10^{-12} AU

Let the distance between the sun and Mars be Y( meters)

Distance in AU= Y\times 6.6844\times 10^{-12} AU

Enrico must multiply the distance of mars from sun (meters) with the 6.6844\times 10^{-12} to convert the distance in astronomical units.

3 0
3 years ago
Read 2 more answers
1. What is the name of a cell that does not have a nucleus or any membrane-
likoan [24]

Answer:

Option 1 : prokaryotic cells

Explanation:

Notably, prokaryotic cells lack a nucleus and membranous organelles. Prokaryotic cells have the following features: 1. The genetic material (DNA) is localized to a region called the nucleoid which has no surrounding membrane.

Extract from my encyclopedia---- ;) hope it helps

7 0
3 years ago
Read 2 more answers
Help on number 2. <br> I think it's A but I'm not sure. Thanks!
Mrac [35]
Yes it is also A!!:)
3 0
3 years ago
Why is reverse transcriptase used to produce proteins artificially?
aleksandrvk [35]

Solution:

The process of formation of mRNA is called transcription which codes for proteins by translation...

Reverse Trancriptase is a process of formation of DNA from RNA....  

This RTase is present in RNA viruses...and now a days are also used in GE.  

Reverse transcriptase is commonly used in research to apply the polymerase chain reaction technique to RNA in a technique called reverse transcription polymerase chain reaction (RT-PCR). The classical PCR technique can be applied only to DNA strands, but, with the help of reverse transcriptase, RNA can be transcribed into DNA, thus making PCR analysis of RNA molecules possible. Reverse transcriptase is used also to create cDNA libraries from mRNA. The commercial availability of reverse transcriptase greatly improved knowledge in the area of molecular biology, as, along with other enzymes, it allowed scientists to clone, sequence, and characterise DNA.  

Thus the right answer is reverse transcriptase tells you the nucleic acid code for a protein.

8 0
3 years ago
Which one of the following is the correct sequence of events that correlates to the sequence of events of a nerve impulse?
quester [9]

Answer:

the correct sequence of the events happened during nerve impulse is (d): 2,1,4,3

Explanation:

Originally K+ ions remains inward the membranes while Na+ ions remains outward to maintain a resting potential of membrane.

Upon stimuli Sodium channels open on membrane and Na+ diffuses inward leading to the depolarization of membrane that is it becoming more positive due to Na+ and K+ ions.

To regain it polarized state or in repolarization state Potassium channels open and K+ begun to diffuse outward while Sodium channels gets closed and Na+ ions remains inside the membrane.

Potassium channels are not efficient as compared to Sodium Channels, so an excess amount of K+ion move outward so Hyperpolarization state achieved.

As the both ions are on the wrong side and will not be available for the next nerve impulse. Hence in Refractory period by the help of Na+/K+ pum, both ions move back to their original place and membrane achieve its resting membrane potential state.

8 0
2 years ago
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