Questions posted in Biology

Ecology is a field of science; it is impartial and it studies the reality but does not have an "agenda" : the correct answer is

C.Ecology is an area of study that focuses on interactions in nature.

The amount of silica

Sometimes scientists make a mistake, or errors / miscalculations, and need to do the experiment again.

Answer:

The wind erosion is defined as the removal of soil particles from a particular area. This erosion mostly takes place in the region where there is less vegetation cover and less amount of rainfall. Presence of vegetation helps in controlling the rate of wind erosion as the plants acts as a barrier to the wind, thereby not allowing it to carry the soil particles with them. But absence of water and vegetation makes the soil dry and the wind removes these particles easily loosing the fertility of the soil.

The wind generally carry the materials by the method of suspension, in which the extremely lighter materials like silt and clay are transported from one place to another.

This is the reason why wind erosion is rapid in the desert areas compared to the places which are rich in thick vegetation cover.

Free Clash of Clans diamonds bonus http://maxclashgems.com This is why some players are so strong! (x4dRI)

Insulin is very important. If there is excess sugar in the body, the pancreas releases insulin to take the sugar and transport it to other cells to make atp

One ribose molecule are found in ATP.

Even though the atmosphere is very thin, the space vehicle is pushing through a lot of pressure. 

Answer:

The correct answer would be b. cellular respiration.

Cellular respiration is defined as the set of metabolic reactions taking place in a cell in order to harness energy from food and convert it in the form of ATP (adenosine triphosphate).

It includes glycolysis, pyruvate decarboxylation, Krebs cycle, and oxidative phosphorylation (electron transport chain, and chemiosmosis).

It requires oxygen for complete oxidation of food (glucose) in order to produce ATP and release carbon dioxide as a byproduct.

The overall reaction can be written as:

C₆H₁₂O₆ + 6O₂  → 6CO₂ + 6H₂O + energy (ATP)

the student could identify the catalyst by noticing the substance that makes a chemical reaction go faster. It will be written in a chemical equation. Example of Catalyst : - A corosion process of an iron will be faster if it exposed to Oxygen - A burning process will be a lot of faster if it mixed with oil.

The correct answer is (d) altered ecosystem.

The increase in the global temperature all over the world due to the harmful effect of green house gases is called global warming. The consequences of global warming can be defined as having an increase in growing seasons, changes in migration and loss of species. All the consequences mentioned here signifies altered ecosystem. The ecosystem consists of the plant and animal species that interact with the environment. Hence, global warming results in altered ecosystem.

The best answer is that a) It drastically reduced the gene pool of the species - that's generally what bottleneck means.

b) The territorial range would be unchanged or, if anything, could grow (with reduced competition)

c) this would not be a bottleneck effect - or at least, this is not how we define it.
d) it reduced the number of genes for both dominant and recessive traits probably, so , not. 

Endoplasmic Reticulum

ER Golgi apparatus, because it packages proteins received from the ER cytoplasm 

The Golgi body are the ones that slightly alter, organize and prepare so-called parcels to be delivered for all the organelles in the cell. They receive these packages mainly in the rough endoplasmic reticulum. These packages that set out by Golgi body are macromolecules that used and synthesized by cells in many operations. If ER is absent then it would only mean that Golgi body would have no use other than simply lysosomes but these macromolecules plays a dynamic role in many organelles –nutrients, ATP and cell metabolism. It'll have a ripple effect if ER is absent in the cell.

False. Biology is more focused on plants. to learn more about the body you should look more into anatomy or physiology.

Since the options aren't given.
Parasitism. There are several types of biotic relationships that is occurring every single moment in the ecosystem and one is parasitism. In this scenario with human beings and mosquitos, this phenomenon of interaction is distinguished as parasitism where mosquitos draws blood that contains nutrients from the human tissue to use it as its source of food and then leaves harmful substances and bacteria in the human’s blood stream.

To facilitate means to make an action or process easier

False. Animal cells has a cell membrane while a plant cell has a cell wall.

-refers to evolution at or below the species level- YES
- includes evolution at the population and community level - YES!
- analyzes the history of life over time - well, I wouldn't choose this answer. life.. as in one life form or all life forms? it's not clear to me. In any case "microevolution" doesn't anlyse anything, it's a process of change...
- refers to evolution above the species level -NO! it would be rather evolution within the same species, on a very small level
- is based on direct observation - NO! it would rather be based on genetic analysis

A membrane like that is called semi permeable, because only certain materials can pass through it.

The genes that produce the enzymes needed to break down lactose are not expressed.

Answer:

Biology

Explanation:

Study of various organ systems including the endocrine system of human provided information about the role of insulin hormone in the regulation of blood sugar level. It elucidated the role of insulin in the development of diabetes.  

Once information about the causes of the diabetes was obtained, the development of methods of its treatment became possible by targeting the regulation of normal insulin level in the body. This is how the study of biology helped in the development of treatment and medicines for disease such as diabetes.  

Nucleus,cells,chromosome,gene,organ,system,organism

The answer to your question is D. To create the full picture of evolution, and how the species that exist on our planet came to exist in their current forms, it is important to take in information from all the possible fields of science including biology, chemistry and geology.

Answer: c. main sequence

The nuclear fusion reaction is the natural process which occurs in the stars which is responsible for their development. The size of the star changes at different stages of their life. A cloud, dust and gas combine to form nebula which is the initial stage of star formation. The star undergoes multiple nuclear fusion reactions with the surrounding heavy compounds like helium, carbon dioxide and hydrogen to attain a stable form. The main sequence is the stable form of star and it takes million's of years to attain this form. Most of the stars in the galaxy are in the main sequence.

The cell is the basic unit of structure and organization of organisms. 

Mitosis is carried out for growth and development processes. The cell divide and multiply for growing and removing the worn out cells/damaged cells. Two identical daughter cells are formed in mitosis. Errors in the same may cause genetic disorders, Sex cells divide by the process of meiosis.

The answer is enzymes. Enzymes are biological catalysts and increase the speed of change from substrate to product. The name of enzymes is usually derived from the substrate they break down. For example, lactase breaks down sugar lactose. The name of enzymes contains suffix -ase, for instance, carbonic anhydrase, lactase, lipase, amylase, etc...

Sexual reproduction in contrast with asexual reproduction which is done outside or in other words, no reproductive organs is necessary hence, fertilization is done outside like plants.

Life processes then includes.
1.   Reproduction, is as vital for an entire race to survive. It prolongs their generation onwards and offspring to the next centuries to pass by. 
2.   Obtaining energy. In both humans and animals, even plants is a challenge because these creatures need to work in order to obtain these need resource from food –preys. 
3.   Maintaining structure. For the living organisms to still exist they need to keep themselves intact. Combating diseases and having nutrition. This is a by-product of having energy.   
4. Irritability. Responding to stimulus
5. Excretion. Able to dispose waste
6. Movement. Being able to be in one place to another.
7. Growth. Able to develop.
8. Death.

A solution is acidic when its pH is below 7, and basic otherwise.

hence this solution is acidic.

This would be paratisitism. One organism, the one that is getting the energy, is called the parasite, and the other, the one from whom the energy is taken, is called the host. 


an example is human (host) and tapeworm (parasite)