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Anna [14]
2 years ago
13

at what distance from the earth's surface is the gravitational potential energy of a spaceship-earth system reduced to half the

energy of the system before the launch?
Biology
1 answer:
galina1969 [7]2 years ago
7 0

Answer:

the right answer is not aviable at this time

Explanation:

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The presence of what group differentiates most amino acids from each other?
Karolina [17]
 <span>Amino acids are the basic structural unit of all proteins. A 'free' amino acid (a single amino acid) always has: 
an amino group -NH2, 
a carboxyl group -COOH 
a hydrogen -H 
a chemical group or side chain -"R". 
Since the amino acids (except glycine) have 4 different groups attached to the a-carbon, they are optically active stereoisomers (recall 23.101 Organic Chemistry) although only L-isomers are found in proteins. 
At a neutral pH, both the amino and the carboxyl groups are ionised, giving what is termed the zwitterionic</span>
6 0
3 years ago
Plant and animal cells have many structures in common except for which of the following?
denis23 [38]

Answer:

A plant and animal cell both have a plasma membrane, ONLY a plant cell has a cell wall. Both of them have cytoplasm, a nucleus to guide them on what to do and ribosomes to produce protein. Only a plant contains a large vacuoles to store water and have chloroplast to do photosynthesis.

Explanation:

7 0
3 years ago
Malik was out walking on a hot day and then decided to go inside an air conditioned
aev [14]

Answer:

Answer:

B. only chemoreceptors,

mechanoreceptors, thermoreceptors, and

nociceptors

Explanation:

Receptors are chemical structures, that

receive and transduce signals that may

be integrated into biological systems.

Receptors that can be found in the

mouth include: chemoreceptors,

mechanoreceptors, thermoreceptors, and

nociceptors.

Chemoreceptors

These are receptors that detects

chemical stimuli, either molecules or ions

dissolved in liquids. An example would

be our taste buds in the mouth, because

they respond to specific molecules or

ions in our ingested food.

Thermoreceptors responds to changes

in temperature. These receptors are

present in the oral cavity, skin and

hypothalamus.

Mechanoreceptors are receptors that

respond to distortion of the plasma

membrane that occurs due to touch,

pressure, vibration, stretch, stress or

strain

. They can be found in the mucosae of

hypothalamus.

Mechanoreceptors are receptors that

respond to distortion of the plasma

membrane that occurs due to touch,

pressure, vibration, stretch, stress or

strain

. They can be found in the mucosae of

ginviva (gum), cheek, tongue and soft and

hard palate.

Nociceptors are receptor responds

to painful stimuli. The purpose of

nociceptors is to inform the body of

injury, damage or threat of damage to

body tissues so that a response may be

made. They can be found in the tooth

pulp and within dentine cavity.

7 0
2 years ago
Are catabolic pathways endergonic or exergonic reactions? Compare the amount of free energy in the reactants to the amount of fr
atroni [7]

Answer:

Catabolic reactions are exergonic.

Explanation:

Exothermic reactions are catabolic, that is, they catalyze molecules, disintegrate them to be able to release energy to the environment that surrounds them and that is how they release or yield to the environment.

5 0
2 years ago
Timeline of the discovery of Uranus​
borishaifa [10]

13, 1781: British astronomer William Herschel discovers Uranus—the first new planet discovered since ancient times - while searching for faint stars. 1787-1851: Four Uranian moons are discovered and named Titania, Oberon, Ariel and Umbriel. 1948: Another moon, Miranda, is discovered. Mar.

thank me and mark me as brainliest

8 0
2 years ago
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