Which type of mutation always creates a stop codon? missense nonsense silent point

QUESTION POSTED AT 23/09/2019 - 03:17 AM

Related questions

20 Points!!!! what is the order in which the following invertebrates envolved: Snails, jellyfish, roundworms, sponges?

Snails:Achatinoidea

jellyfish:
Semaeostomeae

roundworms:
Ascarididea

sponges:
Clathrinida

ANSWERED AT 16/10/2019 - 11:06 PM


QUESTION POSTED AT 16/10/2019 - 11:06 PM

LOTS OF POINTS!!!! A fossilized shell with thin rings indicates what? poor environmental conditions good environmental conditions nothing, because rings cannot be used to determine environmental conditions

I believe the correct answer is "poor environmental conditions." Hope this helps!

ANSWERED AT 16/10/2019 - 11:01 PM


QUESTION POSTED AT 16/10/2019 - 11:01 PM

Explain what type of logging would most likely necessitate reforestation afterwards.

Clear-cutting logging would be more likely to necessitate reforestation afterwards than selective cutting. Clear-cutting removes all trees in an area and results in more significant environmental damage, making it more difficult for the trees to regrow naturally. With selective cutting only some of the trees are harvested, so the overall ecosystem is preserved which makes it more likely that trees will be able to regrow naturally.

ANSWERED AT 16/10/2019 - 11:01 PM


QUESTION POSTED AT 16/10/2019 - 11:01 PM

In a population, when the birthrate becomes higher than the death rate, the population’s growth rate A) decreases. B) increases. C) slows to a stop. D) levels off and remains constant.

Answer is B. when the death rate is lower than the birth rate, population will just continue to increase.

ANSWERED AT 16/10/2019 - 10:47 PM


QUESTION POSTED AT 16/10/2019 - 10:47 PM

Name the four main type of tissues found in a human body.

epithelial, connective, muscular, and nervous tissue

ANSWERED AT 16/10/2019 - 10:31 PM


QUESTION POSTED AT 16/10/2019 - 10:31 PM

What type of rock can be changed into a metamorphic rock? sedimentary only either sedimentary or igneous sedimentary, igneous, or other metamorphic

Sedimentary rock can change into metamorphic rock or into igneous rock

ANSWERED AT 16/10/2019 - 10:17 PM


QUESTION POSTED AT 16/10/2019 - 10:17 PM

Marine science help!! 15 points! Cesium is a radioactive element which was released into the ocean after the Fu kushima nuclear power plant meltdown in 2011. Cesium's half-life is 30 years, which means that for every unit of cesium, half of it will decay over 30 years. How does this affect the human populations that eat fish from this area? A: Cesium's half-life is relatively long, so biomagnification could become a concern. B: All of the cesium will decay in approximately thirty years; therefore, humans can just avoid eating the contaminated fish for thirty years. C: Cesium levels will be acceptable in a short time, so biomagnification is not a concern and humans can eat fish as normal. D: Cesium will only decay by half in fifteen years, so human populations should avoid eating fish in this area and avoid contamination. I'm stuck between A or D... :/

Answer:

A is correct

Explanation:

Since the half-life of Cesium is 30 years, that mean that passing this period of time there is going to be the half of mass of this element in ocean. Of course since day 1 until year 30, there will be plenty of generations of the marine living things, so what is going to happen is that this element can be absorb by the algae or plants from the ocean, Cesium is going to fixed in tissues, so when small fish are going to eat, they are going to accumulate Cesium in their tissues (but a bigger concentration than the producer), when another animal eat this small animal is going to repeat the process, in that way biomagnification will be a concern to humankind.

ANSWERED AT 16/10/2019 - 10:13 PM


QUESTION POSTED AT 16/10/2019 - 10:13 PM

Granite is what type of igneous rock? felsic intrusive mafic extrusive ultramafic intrusive

I believe the answer is the first one you listed,
Hope this helps..

ANSWERED AT 16/10/2019 - 09:59 PM


QUESTION POSTED AT 16/10/2019 - 09:59 PM

Sophia is observing slides under a microscope while adjusting its mirror so that a circle of light can be seen. Which type of microscope is she using? electron microscope compound light microscope scanning electron microscope

Answer:

The correct answer is the compound light microscope.

Explanation:

A compound light microscope comes with two or more lens and it has its own light source. There are objective lenses in a nose piece close to the specimen and ocular lenses in the binocular eyepieces.

A compound light microscope is comparatively small, so it’s easy to use and store, and it has its own light source.

Compound light microscopes reveal very fine details in slides because of their multiple lenses.

Thus, the correct answer is the compound light microscope.

ANSWERED AT 16/10/2019 - 09:56 PM


QUESTION POSTED AT 16/10/2019 - 09:56 PM

Human activities _______. a. exacerbate the natural greenhouse effect b. create the greenhouse effect c. diminish the greenhouse effect d. eliminate the greenhouse effect

Answer: a.  exacerbate the natural greenhouse effect  

Explanation:

Greenhouse effect is a phenomena in which the the diatomic gases like carbon dioxide, carbon monoxide, methane, sulphur dioxide and nitrogen oxides traps the light energy from the sun which is responsible for increasing the global temperatures.

The human activities like burning of the fossil fuels, deforestation, and others can increase the abundance of greenhouse gases in the atmosphere. Therefore, a.  exacerbate the natural greenhouse effect  is the correct option.

ANSWERED AT 16/10/2019 - 09:50 PM


QUESTION POSTED AT 16/10/2019 - 09:50 PM

When a plant starts to reproduce, auxins are released. Also, a large amount of sugar is used to create energy to build reproductive pollen and fruits. Which main plant tissues are working together?

   They differentiate into the three main types: Dermal, Vascular, and Ground tissue. Dermanal in plants, just as in animals, similar cells working together from a tissue.

ANSWERED AT 16/10/2019 - 09:39 PM


QUESTION POSTED AT 16/10/2019 - 09:39 PM

Which type of bacteria can be found in pairs, chains, squares of four, cubes of eight, or grapelike clusters?

Hi there!

Answer: Coccus

Explanation: Coccus is a bacteria with a spherical shape. (staph infection). Bacillus is a bacteria with a rod shape. (E.Coli). Spirillum is a bacteria with an elongated spiral shape. (Cholera).

Hope this helps!

ANSWERED AT 16/10/2019 - 09:32 PM


QUESTION POSTED AT 16/10/2019 - 09:32 PM

What type of muscle moves food through your digestive system?

The answer is smooth muscle.

incase you dont know, smooth muscles are located in the wall of digestive tract.

ANSWERED AT 16/10/2019 - 09:23 PM


QUESTION POSTED AT 16/10/2019 - 09:23 PM

Question 1(Multiple Choice Worth 2 points) In which of the following environments would you NOT expect to find fossils? Active volcanic islands An area with high concentration of sedimentary rocks The Grand Canyon A shallow ocean Question 2(Multiple Choice Worth 2 points) Some species are no longer living but we know they existed at one time. We know this because scientists have discovered fossil evidence we have other species to prove it we have written records we have observations Question 3(Multiple Choice Worth 2 points) Phenotype describes the genetic makeup of an individual the actual genes in an individual the DNA in an individual the appearance of an individual Question 4(Multiple Choice Worth 2 points) The process of fertilization joins sperm and egg y and x chromosomes two daughter cells two parent cells Question 5(Multiple Choice Worth 2 points) The ____ can be described as the basic unit of life. atom neutron cell nucleus

Question 1(Multiple Choice Worth 4 points)



The people of the Peloponnesian peninsula  

shared a common language and religion


were at constant war with each other


were united because of the flat, open countryside which made it easy to travel between different communities


were separated by rugged hills leaving them disconnected and not united




Question 2(Multiple Choice Worth 4 points)



Which of the following was the origin of today's marathons?


the announcement of the Athenian defeat at the Battle of Marathon


the announcement of the Athenian victory at the Battle of Marathon


the announcement of the defeat of the Persians at Mount Marathon


the announcement of the victory of the Persians at Mount Marathon




Question 3(Multiple Choice Worth 4 points)



How was the Greek navy able to defeat the Persian navy?  

Greece had superior generals.


Greece had smaller, quicker ships.


Persian sailors were mainly slaves.


The Greek gods had received enough human sacrifices.  



Question 4(Multiple Choice Worth 4 points)



After the Persian War, what did Sparta, Athens, and other Greek communities collect to ward off future external attacks?


slaves


corn and other grains


money


resources for building walls




Question 5(Multiple Choice Worth 4 points)



Why did Pericles' strategy fail?  

The citizens of Athens stayed within an overcrowded walled city.  

Sparta's navy was able to defeat the Athenian navy.


Sparta's army was able to defeat the Athenian army.


The Persians joined the Spartans.  



Question 6(Multiple Choice Worth 4 points)



How did Pericles die?


at the hands of the Spartan army


at the hands of the Spartan navy


at the hands of the Persian army


during the Athenian plague.  please help me


ANSWERED AT 16/10/2019 - 09:17 PM


QUESTION POSTED AT 16/10/2019 - 09:17 PM

Explain how a change in the sequence of nitrogen bases in a dna molecule could result in a gene mutation

Well, the order and set processes of the nitrogen bases has dominance over the order of the amino acids in the protein. If the bases are altered or mutated, then the amino acids that theseems nitrogen bases code for, are changed. This leads to a different set of amino acids, and therefore a different protein. A different protein is composed, and then the gene containing this different protein will also be different. This has a greater overall impact on some genes than others, depending on which part of the DNA polymer/polymerase is mutated

ANSWERED AT 16/10/2019 - 09:10 PM


QUESTION POSTED AT 16/10/2019 - 09:10 PM

What type of disorder occurs mostly in males?

Err, I'm assuming that there were answer choices that you didn't post, but if not, Obsessive Compulsive Disorder? (OCD)

ANSWERED AT 16/10/2019 - 09:02 PM


QUESTION POSTED AT 16/10/2019 - 09:02 PM

What type of front is most likely to produce severe thunderstorms?

The correct answer is cold fronts

ANSWERED AT 16/10/2019 - 08:51 PM


QUESTION POSTED AT 16/10/2019 - 08:51 PM

What type of tissue carries impulses back and forth to the brain from the body?

Nerve tissue send and carry impulses

ANSWERED AT 16/10/2019 - 08:51 PM


QUESTION POSTED AT 16/10/2019 - 08:51 PM

The ventricle has thicker, more muscular walls than the atria. Relate this difference in wall structure to the functions of the 2 types of heart chamber.

Ventricle has to pump blood
Atria has to store blood

ANSWERED AT 16/10/2019 - 08:32 PM


QUESTION POSTED AT 16/10/2019 - 08:32 PM

What type of transportation is this scenario? a red blood cell made up of 9% potassium has a sodium potassium channel that moves the potassium ions across the cell membrane. if the surrounding plasma which contains 5% potassium and the cell is only permeable the solvent. osmosis active transport diffusion facilitated diffusion?

As the concentration of potassium is higher inside the cell, no energy should be required to transport it outside, but the involvement of the channels for this transport signifies the involvement of a facilitated diffusion of the potassium ions, down the concentration gradient, with the help of the channel proteins. 

ANSWERED AT 16/10/2019 - 08:24 PM


QUESTION POSTED AT 16/10/2019 - 08:24 PM

People sweat to help maintain body temperature. What type of feedback happens when sweating regulates body temperature?

Positive feedback because sweating decreases body temperature. 

I hope this helps:)

ANSWERED AT 16/10/2019 - 08:15 PM


QUESTION POSTED AT 16/10/2019 - 08:15 PM

An organism that reproduces using binary fission, a type of asexual reproduction, creates an identical copy of a cell when A. the cell's DNA replicates and the cell divides, giving each cell an identical copy of DNA. B. part of the cell breaks off and a completely new strand of DNA is created. C. the DNA strand breaks and the cell divides, giving each new cell half of the DNA. D. the cell's cytoplasm spontaneously creates a new strand of DNA and the cell divides.

Answer:

A.

the cell's DNA replicates and the cell divides, giving each cell an identical copy of DNA.

Explanation:

An organism that reproduces using binary fission, a type of asexual reproduction, creates an identical copy of a cell when the cell's DNA replicates and the cell divides, giving each cell an identical copy of DNA. In order for the two cells to be identical, they would need the same DNA, which would result when the DNA strand is replicated.

ANSWERED AT 16/10/2019 - 07:28 PM


QUESTION POSTED AT 16/10/2019 - 07:28 PM