Answer:
541 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago with the end-Permian extinction, the greatest extinction event in Earth history.
source- Britannica
Explanation:
Which type of reproduction is illustrated?
(A) sexual
(B) gestation
(C) asexual
(D) metamorphosis
Answer:
A sexual reproduction is being shown
What is a phenotype?
Two alleles are different
The alleles an organism carries in its
genome, set of alleles.
The characteristics you can see in an organism. Physical appearance, personality, talents, weaknesses, etc
Two alleles that are the same.
Answer:
phenotype refers to the observable characteristics of an organism
HOW can you be a good steward of your epigenome?
Answer: have good genes and regulate the cells case it can affect the future
i don't know.............
answer this and i will brai
nlist
Answer:
whats the question...............
An increase in ocean salinity can increase ___, creating a current.
density
the Coriolis effect
wavelength
Answer:density
Explanation:
An increase in ocean salinity can increase density which results in creating a current. The correct option is A.
What is salinity?The concentration of dissolved salts present in water is meant to refer to as salinity.
In seawater, sodium and chloride are the most abundant ions, but magnesium, calcium, and sulfate ions are also present in significant concentrations.
An increase in ocean salinity can increase density which results in creating a current.
Thus, the correct option is A.
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a food web is shown below. Which of the following organisms compete for the mouse as a food source?
Answer:
it should be the snake bc I have one and the mouse gets eat in by the snake
According to the food web in the diagram, the hawk and the snake are the organisms competing for the mouse as a food source.
FOOD WEB:
A food web is a interaction of many food chains. It shows the feeding pattern of different levels of organisms. Ideally, producers are fed on by primary consumers, followed by secondary consumers, then tertiary consumers. In the food web attached to this image, two arrows connects hawks and snakes to the mouse. This means that hawks and snakes are potential predators or consumers of mouse. Therefore, the hawk and the snake are the organisms competing for the mouse as a food source.Learn more about food web: https://brainly.com/question/20472214?referrer=searchResults
I GIVE BRAINLIEST
Which statement best explains the genetic variation that results from sexual
reproduction?
Answer:
offspring receive a mix of genes from two different parents !
Que neurotransmisor afecta directamente al musculo esquelético: * Acetilcolina Triptófano Adrenalina Serotonina Endorfina
Answer:
Acetilcolina
Explanation:
La acetilcolina es un neurotransmisor excitatorio producido por neuronas del sistema nervioso periférico, es decir, células nerviosas que conectan el sistema nervioso central (SNC) con los diferentes órganos. La unión de acetilcolina a receptores específicos localizados en células del músculo esquelético conocidos como 'receptores nicotínicos' desencadena la contracción del músculo. Los receptores nicotínicos pertenecen a una superfamilia de proteínas de canales iónicos activados a través de la unión a acetilcolina, lo cual desencadena la despolarización de células musculares esqueléticas. Por otra, parte, la acetilcolina también posee un rol inhibitorio en células musculares cardíacas, donde su unión a receptores especifícos llamados 'receptores muscarínicos' disminuye la frecuencia cardíaca.
why are virus able to recognize a host cell,enter its membrane and take over
which tube processes contribute to increase genetic diversity?? please helpp me
Are the nitrogenous bases just free floating in the nucleus? If so..why are they just floating? And how are they made? Thank you :)
Answer:
No, they order in sequences of base pairs in DNA
Explanation:
As you know, there are four nucleotides: Adenine, Thiamine, Cytosine, and Guanine. Adenine and guanine are purines, and cytosine and guanine are pyrimidines. You might not know what that means, so just in case purines are longer and pyrimidines are shorter. Therefore, A pairs with T and C with G. These pairings, along with other structural enzymes, build strands of DNA in the nucleus. I hope that helped, if you have more questions just let me know.
Match the correct letters:
Walls are impermeable to water:___
Site of filtration:___
Contains receptors responsive to ADH:___
Passive reabsorption of Na+:___
Contains blood rich in urea:___
Glucose is reabsorbed into the blood:___
Secretion of drugs such as penicillin takes place here:___
Afferent arteriole:___
➠ Wall are impermeable to water : cork.
➠ Site of filtration : glomerulus.
➠ Contains receptors responsive to ADH : hypothalamus.
➠ Passive reabsorption of Na+ : lumen.
➠ Contains blood rich in urea : liver.
➠ Glucose is reabsorbed into the blood : proximal tubule.
➠ Secretion of drugs such as penicillin takes place here : renal tubles.
➠ Afferent arteriole : tubuloglomerular.
PLEASE, PLEASE, PLEASE HELP!!! REAL ANSWERS ONLY!!! NO LINKS OR I WILL REPORT!!! NO BOTS EITHER!!!
Respond to the question: How do things move across a cell membrane? Give two examples. (5-8 sentences)
https://www.khanaca demy.org/gclassroom/test-prep/mcat/cells/transport-across-a-cell-membrane/v/how-do-things-move-across-a-cell-membrane
That is the video. Remove the space to make it work.
Answer:
osmosis ........... just use a paraphrasing tool for the explanation below
Explanation:
Another method of movement across the membrane is osmosis. Osmosis is the movement of water from a region of higher concentration to one of lower concentration. Osmosis occurs across a membrane that is semipermeable. A semipermeable membrane lets only certain molecules pass through while keeping other molecules out.
just use a paraphrasing tool
Does light have an effect on carbon dioxide production by plants and animals?
(No Links!! type the answer)
Answer:
Light provides the energy for photosynthetic pig- ments to convert carbon dioxide (CO2) and water into sugars and oxygen. As light intensity increases – until a point – the amount of sugars increases and thus, more energy is available for plant growth and maintenance. ;)
What is the color of the stars with the lowest surface temp?
Answer:
red
Explanation:
Can anyone help p,ease
Answer:
im not understanding :(
Explanation:
the structure that prevents perspiration from running down the forehead into the eyes and shades the eyes from sunlight is the
Answer:
The Eyebrows
Explanation:
The eyebrows are not just those short hairs that humans can use to make signals for non-verbal communication with other humans, they, as one of the accessory structures of the eye, protect the eyes from perspiration (sweats) dripping down the forehead, or water running down from the head from entering the eyes, causing irritation. They also help shade the eyes from the high impact of the sunlight and help keep dirt away too.
Atoms from sugar molecules may combine with other elements via chemical reactions to form other large carbon-based molecules
Answer:
Yes.
Explanation:
Yes, carbon atoms from sugar molecules combine with other elements through chemical reactions to form other large carbon-based molecules. Sugar molecules comprise of carbon, hydrogen, and oxygen atoms. The hydrocarbon of sugar molecules are used to make amino acids and other carbon-based molecules that can be combine into larger molecules such as DNA molecule.
What percentage of the U.S. population has Rh+ blood?
Answer:
85% of the the U.S. population has Rh+ blood
Explanation:
Out of the total population of USA, nearly 15% of the individuals are having Rh negative blood.
The remaining population has Rh positive blood which is equal to 100-15%
or 85%.
Thus, 85% of the the U.S. population has Rh+ blood
what is the difference between biotic and abiotic limiting factors?
Explanation:
Abiotic limiting factors restrict the growth of populations. They help determine the types and numbers of organisms able to exist within an environment. Biotic factors are living things that directly or indirectly affect organisms within an environment.
In normal differentiated somatic cells, telomerase Group of answer choices repairs double strand breaks in DNA. adds material to the ends of chromosomes with each cell division. is not expressed and telomere tips erode with each division. removes telomere tips with each division.
Answer:
BTS DNA
Explanation:
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I Need heelp really bad plz someone
Answer:
the answer is sunlight
Explanation:
got it correct on the test
Trade winds blow from the horse latitudes toward the______.
equator
the tropics
the poles
Answer:
the correct answer is the equator
PLs, help me with this question
Answer:
Amino acids
Explanation:
List 2 features of mangrove trees that enables them to survive in the swamps
Small, dark portion in the eye is called:
Answer:
Pupil
Explanation:
It is the dark part of the eye
Answer:
The pupil appears as the dark central part of the eye.
Explanation:
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Different levels in the arctic food web are represented in
che energy pyramid.
Based on the food web, which of the following identifies
the organisms in each level of the pyramid?
Answer:
the first level is producers (which is the food/ feeder)
second level is primary consumers ( the prey/ the one getting eaten/ eats the feeder)
the third level secondary consumer ( the predator eats the prey )
Explanation:
i don't know what the question was really so I hope this helps :-)
how does reducing gene flow cause speciation
Answer:
reduction of gene flow can occur due to geographical isolation too
or it can be dur to sympatric or allopatric speciation an occur.
where due to this the species are being behaviouraly isolated, and mad too reject mating due to certain reasons. Moreover mutations too can take palace causing for a genetic drift. Where the isolated species may undergo selection pressure too. So as an overall view the gene flow eventually decreases since the species diversity along with the genetic diversity decreases causing fare the reduction of the gene pool.
After many generations a new species will be formed. Resulting for speciation.
(refer to the AL biology text book under biodiversity related topics, it will be easy)
What element would we not be able to shower without?
4 Why will alcohol keep on boiling even after the flame was turned down?
The alcohol keep on boiling even after the flame was turned down, Alcohol has a lower boiling point than water.
What do you understand by the term boiling point?The boiling point is the temperature at which the substance passes from a liquid to a gaseous state.
Thus, Alcohol has a lower boiling point than water.
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