All of the following are examples of limiting factors in an ecosystem except

Differences between asexual reproduction and sexual reproduction can be summarized into 6 aspects:

1.      Number of parents

2.      Makeup of offspring

3.      Cell division process

4.      Advantages

5.      Disadvantages and,

6.      Life cycles

Among the six, the most important difference where you can easily identify asexual and sexual reproduction is the number of parents. In asexual reproduction, there is only one parent (either a male or a female) while in sexual reproduction, there are two parents (1 male and 1 female). 

Answer:

d

Explanation:

obviously.

Answer:

stem cells can eventually be used to replenish cells in the human body that have been lost to the disease.

Explanation:

Stem cells are undifferentiated and have the ability to limitlessly renew themselves.

Answer:

Prokaryotes.

Explanation:

Prokaryotes are the unicellular organism that lacks the membrane bound organelle. A well defined nucleus is absent in the prokaryotic organism. Three domain of life are archaea, bacteria and prokarya.

Prokaryotes include the domains archaea and bacteria. Both these domains contain flagella like structure for their locomotion. The organisms are unable to be seen with naked eye and all organism are microscopic organism.

Thus, the correct answer is prokaryotes.

Answer:

Option A, the break down of food molecule

Explanation:

During hydrolysis of ATP, 1 molecule of phosphate is released  and ADP is formed

The hydrolysis of  ATP to produce ADP is a reversible reaction and thus ADP uses the extra energy with in the cell to convert back to ADP. This extra energy comes from the food break down.  

The reactions involved are as follows  

Hydrolysis of ATP  

ATP  ----> ADP + P + energy

Formation of ATP from ADP

ADP + P + energy -------->  ATP

Answer:

It decreases the amount of energy necessary for the reaction to proceed.

The combining form referring to the male gland that encircles the upper end of the urethra is 'prostat/o' which relates to the prostate gland. It is used in medical terminologies like 'prostatitis' and 'prostatectomy'.

The combining form that refers to the male gland that encircles the upper end of the urethra is 'prostat/o'. This form is derived from the word prostate, which is the name of the gland in question. The word 'prostate' itself comes from a Greek word meaning 'one standing in front', referring to its location in the body. The prostate gland plays a crucial role in sexual functions and in the process of ejaculation.

For instance, in medical terminology, you may see this combining form used in words like 'prostatitis', which is inflammation of the prostate gland, or 'prostatectomy', which is the surgical removal of all or part of the prostate gland.

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The enzyme known as ‘catalase’ is involved in the breakdown of hydrogen peroxide molecules into separate water and oxygen molecules helps speed up or speed slow down the reaction as it is an enzyme.

These are the biological catalysts that help to slow down or breakdown the rate of reaction that is the reaction in which the reactants are getting broken down into products.

Catalase enzyme that will help to breakdown the hydrogen peroxide into its products as mentioned in the equation which help to catalyse the reaction but remain unaltered on itself that is enzymes do follow the lock and key mechanism.

The substrate and enzyme fit into each other like the lock and key but after the condition change of reactants into products, the substituents remain unchanged and  without getting used gets released out from the reaction.

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Macromolecules contain large number of atoms. Milk contains both carbohydrates and proteins, because it gave a positive result upon the addition of Benedict’s solution which indicated an orange color. It means that there is a concentration of reducing sugars in milk.

Answer:

Scientific research is based on the scientific method. The objective of a scientific investigation is to obtain information based on observations to solve questions and understand the natural phenomena that surround us. In a scientific investigation it is important to be clear about the research question, the initial hypothesis, the methodology and how the results will be analyzed.

The correct answer is option C, that is, the presence of the nuclear membrane.  

Cyanobacteria is a phylum of bacteria that attain their energy via the process of photosynthesis, and are the only photosynthetic prokaryotes possessing the tendency to generate oxygen. As a prokaryote, they are devoid of the nuclear membrane.  

Euglena refers to a single cell flagellate eukaryote. It comes under the class Euglenoidea. The species of Euglena are witnessed in salt water and in freshwater. Being a eukaryote, they possess nuclear membrane.  

The difference between them is the presence of nuclear membrane in euglena.

A unicellular organism is an organism that possess only one cell. Usually, here are organelles in the cell that enables the organism carry out its functions

Euglena is;

So, euglena and Cyanobacteria are photosynthetic, they are able to manufacture their own food. However, the difference between them is the presence of nuclear membrane in euglena.

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Answer:

Disassociation, polarization and attraction

Explanation:

In an hydrogen bond, the hydrogen act as partially positive atom while the other element to which it is bonded act as partially negative atom. This second element other than the hydrogen can be oxygen, fluorine, chlorine etc.

First the hydrogen bonds disassociates and polarizes thereby forming two poles one positive and the other one negative.

The positive poles now try to attract the negative pole of other molecule of the same substance or any other substance. The same happens with the negative pole also.

I believe that the answer is D

B. too many nuclear explosions in reactors

Answer:

Option (4).

Explanation:

Biological interactions are important among the organism that helps them to survive in their environment. Biological interactions may be harmful or useful for the organisms.

Mutualism may be defined as a type of interaction in which both the species are benefited from each other. Amy should include relationship A in mutualism. Commensalism may be defined as the type of interaction in which one species is benefited and other organism is neither benefited nor harmed the individual. The relationship B is involved in commensalism.

Thus, the correct answer is option (4).

Cells grow during the interphase of the cell cycle, which includes DNA replication to prepare for division. This ensures that each new cell is of the proper size and has the correct genetic material, preventing them from getting smaller with each division.

Cell Growth and Division:

To ensure cells do not simply get smaller and smaller with each division, they need to grow. This growth happens in the interphase stage of the cell cycle. During interphase, the cell increases in size and prepares for division by replicating its DNA. After a cell is born, it passes through this critical phase before it is ready to divide. Interphase consists of gap phases (G1 and G2) and the S phase, where DNA replication occurs. Once a cell has grown and replicated its DNA, it can enter mitosis and cytokinesis, thus completing cell division and ensuring each new daughter cell has the correct amount of genetic material and cellular components. Cell division is the basis of growth, development, and maintenance of organisms.

DNA replication is a crucial step that occurs just before the cell divides. Two identical chromosomes are created from one, which guarantees that each new cell receives a full set of chromosomes. This precise process is essential for cell growth and health of an organism.

The relationship between cell division and growth varies across organisms. Some cells may divide without growth during early development, but eventually, to continue dividing, there needs to be an increase in mass and size shown by the acquisition of materials for new cell formation.

The primary CPT code for an adenoidectomy is 42820. For a second adenoidectomy performed on the same patient in the same year, it could be coded as a repeat procedure using the modifier -76 or -77 after the main code.

The CPT® (Current Procedural Terminology) code for an adenoidectomy is generally 42820 for a single adenoidectomy or 42821 for adenoidectomy with tonsillectomy. But, if this is a second adenoidectomy performed on the same patient in the current year, then it could be coded as a repeat procedure using the modifier -76 or -77 following the primary code, depending on whether the same physician or a different one performed the procedure. For instance: 42820-76 or 42820-77.

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