BIOLOGY HIGH SCHOOL

Which term best identifies a muscle cell?

Answers

Answer 1
Answer: A muscle cell is also termed as a myocyte. A myocyte is a long tubular-shaped cell found in muscle tissue. They are produced through a process called myogenesis. Myocytes develop from myoblasts which are embryonic cells. The different types of muscle cells include: skeletal, smooth, and cardiac myocytes. 

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A stimulus triggers the body to create a response that feeds back to reverse the changes caused by the original stimulus. What is this process called?A. positive feedback loop B. negative feedback loop C. constant feedback loop

Dr. Besson has invented a drug that she believes will be an effective treatment for migraines. If the drug is truly safe and effective, she may become quite rich, so she has a strong financial incentive to conduct research that proves that the drug is safe and effective even if it isn't. What aspects of the scientific process will tend to decrease the likelihood that she will publish low-quality research that mistakenly concludes that the drug is safe and effective?

Answers

The aspect of the scientific process that will decrease the likelihood of publishing low-quality research is : Statistical hypothesis testing

Statistical hypothesis testing

Statistical hypothesis testing is used to determine the conclusion from two different, conflicting hypothesis ( i.e. null and alternate hypothesis ).

This testing is carried out on a determined sample of the population and the difference between the sample and the null hypothesis determines if the results from the the statistical hypothesis testing will be accepted or not, because the null hypothesis is true. i.e.

  • If the difference between the result and the null hypothesis is insignificant the drug is safe and effective.  if not
  • The drug is not safe and effective.

Hence we can conclude that The aspect of the scientific process that will decrease the likelihood of publishing low-quality research is : Statistical hypothesis testing

Learn more about statistical hypothesis testing : brainly.com/question/15980493

Answer:

statistical hypothesis testing

Explanation:

The  new drug must be evaluated by statistical tests in order to  compare this it with a control (i.e. a placebo).  This comparison must be statistically significant to accept the hypothesis that the drug is effective. The statistical significance in these tests is very important since it is the only way to accept a hypothesis with confidence that it is true. If Dr. Besson doesn't get that, their drug will hardly be released.

On the other hand, proving that the drug is safe (i.e no harmful side effects) implies more research and is more difficult to prove.

Explain why freedom of speech is important for the media

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if the media didn't have free speech, the media could not comment on any situation. and whenever they comment on these situations, it can ease the options of some topics today.

Which statement best describes the composition of magma?A. Magma contains only three elements.
B.Magma contains the same element's as snow.
C.Magma contains the same element's as Earth's crust.
D. Magma is an element all it's own.

Answers

The answer is option C (Magma contains the same elements as Earth's crust) Magma is basically a part of the earth crust; it originates in the lower part of the Earth’s crust and contains the same elements as the earth’s crust, namely Oxygen, Silicon, Aluminium, Iron, Calcium, Sodium, Potassium and Magnesium.

The best answer would be C

Write a note on RNA polymerase

Answers

Answer:

Ther RNA polymerases (abbreviated as RNAPs or RNA pols), represent a group of conserved enzymes that synthesize RNA from DNA templates

Explanation:

These enzymes are used to synthesize different RNA species such as, amon others, messenger RNA (mRNA), transference RNA (tRNA), noncoding RNAs (ncRNAs), etc. During the gene transcription, the RNA pol is used to produce a mRNA molecule that subsequently is translated into protein

Answer: By definition, RNA polymerase or ribonucleic acid polymerase is a multi-subnunit enzyme that catalyze the process of transcription where an RNA polymer is synthesized from a DNA template.

Explanation:

RNA polymerase are highly conserved in evolution among eukaryotes, bacteria, archea and some viruses. Bacreria and archea has a single RNA. RNA polymerase are considered as molecular motors because of their stepwise movement on DNA. They are also central to biology information flow since they catalyzed templated polymerization reaction.

Some epithelia are pseudostratified. What does this mean?

Answers

Answer:

Pseudostratified epithelium is a type of epithelial tissue that appears to be stratified (multiple layers of cells) when observed under a microscope, but in reality, it is a single layer of cells. The term "pseudo stratified" means "false stratified."

Explanation:

In pseudostratifiedied epithelium, the cells are of different heights, and their nuclei are located at varying levels within the tissue. This arrangement gives the appearance of multiple layers, even though all cells are attached to the basement membrane and rest on it, making it a single-layered tissue.

  • Pseudo stratified epithelium is commonly found in the respiratory tract, where it helps in functions such as mucus secretion and the movement of cilia to clear debris and pathogens from the airways.

Final answer:

Pseudostratified epithelia appear to have multiple layers but in reality, all cells extend from base to surface. The differing lengths and nuclear positions create an illusion of stratification. An example is the pseudostratified columnar epithelium in the respiratory tract.

Explanation:

The term 'pseudostratified' in biology, when referring to epithelia, means that the cells appear to form multiple layers (stratified), but in reality, they do not. Every cell in such epithelia extends from the base to the surface, but they have differing lengths and the nuclei are at different levels. This alters their alignment and contributes to their 'stratified' appearance.

An example is the pseudostratified columnar epithelium found in the lining of the respiratory tract. These cells appear layered due to their variable length and nuclear positioning, but all are connected to the basal membrane, qualifying them as a single-layered, or 'simple', epithelium. The 'pseudo-stratified' term simply denotes this illusion of layering.

Learn more about Pseudostratified epithelia here:

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After a dreary day of rain, the sun peeks through the clouds and a rainbow forms. You notice the rainbow is the shape of a parabola.

Answers

Rainbow is mainly caused when light hits the tinu raindrops and reflects from the surface of those drops. The raindops actually works as a prism by separating the different bands of light that are present within the white sunlight. We continuously see the raindrops because one drop of rain is quickly replaced by another and this causes a continuous effect. The angle between the incoming light and the reflected light is 4o degrees for violet band and 42 degrees for the red band. The angle of bending is always different for different colors of light. 
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