What is the largest structure ever made by life on Earth

Savatey [412]

One of the 4 nucleic acids that make up dna. It is purine derived & pairs with thymine.

5 0

3 years ago

An igneous rock is found on the ground and has no identifiable crystals. What is the most likely origin of this rock?molten mate

quester [9]

The answer would be: Molten material that cooled quickly.

Igneous rocks are formed by the cooling of molten material. So we can cross out the last two choices. The rock has no identifiable crystals so it is most likely an Extrusive igneous rock. They form on the surface where they cool quickly.

Those that form underground are called intrusive rocks. They cool slowly allowing enough time for crystal formation.

4 0

3 years ago

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He light colored rock pocket mice in New Mexico blend in with the sandy soil of the area, but on darker lava flow, the light col

fiasKO [112]

Answer: option B they have a random gene mutation that affects their fur colour.

Explanation :-

Variation is the phenomena which occurs in all populations.
These variations result in slight differences in the phenotypes of individuals .

These variations only arise due to random mutations that arise in the individuals’ genome and then can be inherited by their offspring.

There is always a probability of one particular trait to make the individuals survive better in the environment as compared to other trait.

The individuals having the trait that helps them to survive better in the environment tend to survive more and leave more progeny. This is termed as survival of the fittest.

Thus, according to the question it can be inferred that the dark fur colour arose due to a random mutation since it is the only source of variation. Since, in the given environmental conditions the mice having the dark fur colour were less susceptible to the predators they are better fitted to survive.

The dark brown fur coat mice, survive better, leave more progeny and hence, increase their population with time. However, the orginal source of origin of this trait was a random mutation. Had this mutation not occured, the dark coloured fur mice would not have been there.

So, a random gene mutation affecting the fur colour made the dark coloured mice first appear in the population.

6 0

3 years ago

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Please help I can’t figure this out

Ilia_Sergeevich [38]

Answer:

Photosynthesis is the process in which cells use carbon dioxide and water to make glucose in the presence of sunlight.

Respiration is the process in which glucose molecules are utilized to release energy in the form of ATP.

Explanation:

Ans1- Respiration in cells occurs in mitochondria. Cells gain energy in the form of ATP. Conversion of glucose in the form of ATP is known as cellular respiration.

Cellular respiration can take place either in presence of oxygen(aerobic respiration) or in absence of oxygen(anaerobic respiration ).

Before entering into cellular respiration glucose molecule has to be converted into pyruvic acid. This process in known as GLYCOLYSIS.

Anaerobic respiration occurs in mitochondria when oxygen is not present. It is known as fermentation.It is not effective process to produce ATP from glucose as in this process only 4 ATP can be released.

Aerobic respiration occurs in mitochondria in presence of oxygen. This is effective pathway to gain ATP as it releases 36 ATP from 1 glucose molecule.

Ans2- All cells which has photosynthetic pigments are able to use photosynthesis. Example- Blue green algae, cynobacteria etc.

Ans3- We can see different shades of green colors of plants and leaves because of different types of chlorophyll present in plant. Chlorophyll are of 6 types in plant. Their types are based on the lights they absorb. Two main types of chlorophylls are chl a and chl b.

Ans4- Both plant and animal cells have mitochondria. In plant also they need energy. To get ATP from breakdown of glucose respiration is occur in plant also.

Ans5-In photosynthesis glucose is formed from water and carbon di oxide. 6 carbon dioxide and 6 molecules of water are used to make 1 molecule of glucose. Water and carbon di oxide are reactant in this process.

Ans6 - Cells without oxygen can burn glucose to release energy. This process is known as Anerobic respiration/ fermentation. But the outcome of energy is lower than aerobic respiration. ( ANS1)

Ans7- In the process of photosynthesis reactants are water and carbon di oxide. Oxygen produced released in the form of gas along with carbon di oxide.

Ans8- The enzymatic reaction of respiration occurs in mitochondria. Krebs cycle occurs in the matrix of mitochondria.( ETC electron transport chain) to release ATP occurs in cristae of inner membrane of mitochondria.

Ans9- Plants make glucose through photosynthesis . In presence of sunlight plants use carbon dioxide and water to make sugar.

6 0

3 years ago

Conservation groups are concerned with wild animal populations so they have pressured governments to create laws to protect them

Bumek [7]

Answer: A

Explanation:

Whaling is the practice or industry of hunting and killing whales for their oil, meat, or whalebone.

3 0

3 years ago

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What is the largest structure ever made by life on Earth​

What is the largest structure ever made by life on Earth