Describe the appearance of dna in a typical prokaryotic cell

Answers

Answer 1

Answer:

Explanation:

The prokaryotic cell or prokaryotes are single celled organisms that do not posses organelles or membrane bound structures hence they do not have a nucleus but they posses single chromosome which is a piece of circular double-standard DNA in the nucleoid.

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The alleles for eye color in fruit flies involves one allele that might contain the sequence CCAT. Assume that this allele produces red eyes in a fruit fly, because the allele produces a protein that makes red pigment. Assume that another allele of this gene has a slightly different sequence in the middle: CAAT, instead of CCAT.Which of the statements below is true about the alleles for eye color in fruit flies? Which of the statements below is true about the alleles for eye color in fruit flies? A) The alleles for eye color produce the same phenotype. B) The small change in the DNA sequence causes the allele to produce a different protein, resulting in the production of white eyes instead of red eyes in the fruit fly. C) Changes in the sequence of DNA bases in a gene do not contribute to genetic variation in the fruit fly population
Which best differentiates between chemical digestion and mechanical digestion? Chemical digestion happens in the small intestine; mechanical digestion happens in the mouth. Chemical digestion involves the breaking down of food with enzymes; mechanical digestion is breaking down food by chewing and tearing with teeth. Chemical digestion is the breakdown of fats; mechanical digestion is the breakdown of proteins. Chemical digestion is done only by the major structures of the digestive system; mechanical digestion is done by the accessory structures of the digestive system.
A particular gene does NOT constantly churn out the same protein at all times in every cell. This is true for two reasons. First, _____ can allow one gene to produce several different proteins. Second, genes are constantly being turned on and off through the process of _____.
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What would go wrong if your body used positivefeedback to regulate body temperature? For
example, what would happen if a person sweats
when temperature decreases?

Answers

Answer:

Most general problem: Homeostasis would be thrown off.

Explanation:

When a person sweats, they are trying to cool themselves off from a high internal body temperature, sweating when cold can make the person colder and make it even harder for that person to maintain homeostasis without throwing multiple body functions out of sync.

However there is a condition that is associated with Hyperhyrosis (increased sweating) that makes a person sweat when cold: cold sweats, however this is also concerning when a person is cold. But as long as a person has no other symptoms, it is no need for concern.

Other than that, organs can take damage. It would be like the skin going into goose bumps when a person is getting heat stroke, the organs are too hot as is the skin, but it is unable to let any response out to maintain homeostasis.

Cold sweats are also triggered by a fight or flight responce. So the main take away is that the body would not know how to react because Homeostasis has been thrown off.

Final answer:

Positive feedback amplifies changes, so if your body used this to regulate temperature, you would sweat when cold, further lowering your body temperature. This could lead to dangerous situations, such as hypothermia. Normally, the body uses negative feedback to regulate temperature.

Explanation:

If the body used positive feedback to regulate body temperature, it would disrupt the body's homeostasis. Positive feedback amplifies changes rather than counteracting them like negative feedback. So, if you began to sweat when your body temperature decreased, you would lose even more body heat, causing your body temperature to drop further. This could lead to a dangerous situation, such as hypothermia, where your body's temperature falls too low to perform physiological functions correctly.

Normally, body temperature is regulated by negative feedback. When the body gets too warm, it sweats to cool down, and when the body gets too cold, it shivers to produce heat. Thus, flipping this balance would disrupt the body's ability to maintain a stable internal environment.

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Several hours following death the muscles of the body stiffen, a condition commonly referred to as rigor mortis. What is the cause for the stiffened muscles?Myosin heads are not attached to actin filamentsMyosin heads are attached to actin filamentsActin degenerationMyosin degenerationBuild up of ATP due to lack of circulation

Answers

Answer:

Myosin heads are attached to actin filaments

Explanation:

During the process of muscle contraction, myosin heads are attached to actin filaments. ATP is necessary for their release and for the muscle relaxation.

In rigor mortis, myosin heads continue binding with the active sites of actin proteins. This occurs because after death, there is no production of ATP and consequently, the muscle is unable to relax until further enzyme activity degrades the complex.

A relationship in which one species consumes and the other is killed is known aspredation.
parasitism.
commensalism.
mutualism.

Answers

Predation

It can be explained in that way or also called Predatory/prey relationships.
Parasitism is when one is benefited and the other harmed (ie leech and human)
Commensalism is when one is benefited and the other not affected (Tree frog and rainforest tree)
Mutualism is when both are benefited (Bee eats honey and Flower is pollinated).

A relationship in which one species consumes and the other is killed is known as predation.

Dependence and Addiction are the
same thing?
a. True
b. False

Answers

Answer:

Explanation:

one is a necessity, the other is a struggle

Homeostasis is the body's ability to maintain constant _______ conditions when _______ conditions change.a. internal; external
b. external; internal
c. oxygen; temperature
d. temperature; pH

Answers

The best answer is a - internal : external
Homeostasis is the body's ability to maintain constant internal conditions when external conditions change.

It is the ability of an organism or a cell to regulate its internal conditions, usually through a system of feedback controls so as to stabilize the health and functioning regardless of the outside changing of conditions..

For example in man, homeostasis occurs when the body regulates body temperature in an effort to maintain an internal temperature at around 37° C.

Homeostasis is the body's ability to maintain constant internal conditions when external conditions change.

Homeostasis is the body's ability to maintain constant internal conditions when external conditions change.

It is the process by which the body adjusts to changes and maintains equilibrium by ensuring that body functions remain within a certain range.

For example, when the body becomes too warm, adjustments are made to cool the body.

Homeostasis is essential for the proper functioning of the body and is regulated through various feedback mechanisms.

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Which type of selection leads to increased phenotypic and genetic variation?

Answers

The answer is B. Disruptive selection

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