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3 years ago

How does the rapid reproduction in bacteria cause them to evolve quickly?

1 answer:

7 0

Bacteria reproduce through binary fission. Each time this happens, there is a certain chance that a mutation will occur. This is measured through mutation rates. Generally, these rates are low. However, bacteria not only live short lives, but they also reproduce extremely fast. Thus, due to the high reproduction rates, mutations can accumulate rapidly in a population.

It is similar to the process of making a copy of a copy. However, there is some dirt on the xerox's plate. Thus, the copy will have these spots. Now, if you make a copy of a copy, this second copy will have double the amount of spots (mistakes) than the original. Now image this proces going on and on and on.

Not all the copies will survive, as not all mutations are beneficial (the process of natural selection). However, even if a small percentage survive (have advantageous mutations) and the copying process (binary fission) occurs fast enough, mutations will accumulate quickly. This will lead to a quick evolutionary process.

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In a piece of hemoglobin beta chain,how might u look to see an mrna in Ecoli?

hodyreva [135]

Answer:

Hemoglobin is responsible for binding and transporting oxygen in the body. It is a tetrameric protein that is found in high concentration in red blood cells (erythrocytes, red blood cells). Each hemoglobin molecule is made up of four subunits: two of the alpha type and two of the beta type, and each subunit can bind an oxygen molecule through its heme group.

Structure studies have shown that hemoglobin can adopt two conformations, called T (tense) and R (relaxed). Deoxyhemoglobin (in blue) is in state T, and the union of oxygen (in red) causes the transition to state R. The animation shows a close view of the heme group (in white, balls and rods) of one of the subunits of hemoglobin. In the deoxygenated state (T), the iron atom is not coplanar with the rest of the heme group due to its association with the histidine side chain. The union of oxygen displaces the iron atom so that it remains coplanar with the rest of the heme group, which in turn drags histidine, producing a larger-scale conformational change that affects the entire protein.

Hemoglobin can be considered as a tetramer formed by two alpha-beta dimers. The conformational change associated with the transition from T to R mainly affects the relative position of these two dimers (rather than the interactions between the alpha and beta subunits within a dimer). This is illustrated in the last stretch of the animation (drawn in black and white).

5 0

3 years ago

Select the correct answer.

dangina [55]

Geosphere is the sphere containing sediments as well as rocks

hydrosphere can be regarded as the sphere which contains total amount of water that exist on a planet.

The geosphere can be regarded as the collective name that is used to call the atmosphere of the earth lithosphere as well as hydrosphere, and cryosphere.

The geosphere can be regarded as sphere which contains the rocks as well as minerals on Earth

The geosphere is also the sphere with abiotic/non-living parts of soils as well as the skeletons of animals, it also contains sediment as well as rocks.

An atmosphere can be regarded as the layers which consists of gases which envelope a planet.

Therefore, geosphere is collection of spheres containing sediments as well rocks.

Learn more at: brainly.com/question/5137630?referrer=searchResults

4 0

3 years ago

After suffering a head injury, doctors discover that your

VikaD [51]

Answer:

1. You will be unable to smell

3. Your olfactory receptor cells will no longer be able to respond to molecules trapped in the mucus.

Explanation:

The Olfactory receptors are the receptors present in the olfactory neurons which detect different odorants or smell.

The olfactory receptors are embedded in the epithelium or mucous lining of the nose in which one extension of the cell body reaches the epithelium surface and branches into cilia like structures which sense the odour.

If the axons of the olfactory cells are broken then the cells will not be able to respond to the molecules trapped in the mucus and thus no detection of odour. The signal will not be generated in response and thus will not be sent to the brain. Thus, the person will not be able to smell.

Thus, Options-1 and 3 are correct.

5 0

4 years ago

Intercostal nerves Group of answer choices are also known as cervical nerves. do not enter into a plexus and directly connect to

Natali [406]

Answer:

The correct answer is: do not enter into a plexus and directly connect to the structures they supply.

Explanation:

The anterior rami of the thoracic spinal nerves from T1 to T11 give birth to the intercostal nerves, which are part of the somatic nervous system.

The intercostal nerves supply the thoracic pleura and abdominal peritoneum, and they vary from the anterior rami of the other spinal nerves in that they each take their own path without forming a plexus, directly connecting to the structures they supply.

The intercostal nerves are derived from the somatic nervous system, unlike the autonomic nervous system nerves that innervate the visceral pleura of the thoracic cavity. They can govern muscle contractions and give sensory information about the skin and parietal pleura as a result of this. This explains why damage to the thoracic cavity's interior wall can be felt as a severe discomfort in the damaged area. Damage to the visceral pleura causes a pain that is not localized.

5 0

3 years ago

Charles and Irene are editors at a content development firm. Both of them, unknowingly, are working on the same copy of the ann

Keith_Richards [23]

Answer:

lost-update program

Explanation:

Based on the information provided within the question it can be said that this is an example of the database problem known as lost-update program. This term refers to when more than one individual is attempting to update a database entry within the same column and same row, at the same time. This causes the first entry that was saved by the system to be completely overwritten and lost. Such as what happened to Irene's report since it was saved first and then overwritten by Charle's report.

6 0

3 years ago