Why are parasitic nematodes important?

YO IF OUR FINGERS HAVE FINGER TIPS AND OUT TOES DONT HAVE TOE TIPS DEN HOW CAN BE TIP TOE

FromTheMoon [43]

Answer:

I don't know like what does it basically mean??

4 0

3 years ago

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According to Darwin, in the struggle for survival, those individuals whose traits best enable them to survive and reproduce will

valkas [14]

Answer:

This is the basic idea behind his theory of Natural selection

Explanation:

The theory of Natural selection was demonstrate in Darwin's book known as 'Origin of species' which was written in 1859

In this book, the process of change of an organism over time is described and also mentioned about their physical as well as behavioral changes.

Natural selection means the survival and reproduction of individuals by changing the phenotypes.

Natural selection is a process by which the nature accepts those organisms that can change their phenotype in order to survive with changing environment and eliminate those phenotypes that are not favorable for their survival.

5 0

4 years ago

The heart is a cone-shaped muscular organ located within the ________ of the thorax. its apex rests on the ___________ and its s

Arte-miy333 [17]

The heart is a cone-shaped muscular organ located within the mediastinum of the thorax.

The mediastinum is the space lined with membranous tissue between the lungs. The mediastinum contains not only the heart but also the great vessels (pulmonary artery, aorta, pulmonary veins, and the superior and inferior vena cava), as well as parts of the esophagus and the trachea.

Its apex rests on the diaphragm and its superior margin lies at the level of the 2nd rib.

The apex of the heart is the conical area created by the confluence of the ventricles, but mainly by the left ventricle. It rests on the diaphragm. The superior margin of the heart, also known as the base, lies at the level of the second rib.

Approximately two-thirds of the heart mass is seen to the left of the midsternal border.

This is because to the left of the midsternal border lies the left ventricle which comprises most of the heart mass as the left ventricle is the one responsible for pumping blood throughout the systemic circulation and significant pressure should be overcame; resulting to the physiologic hypertrophy of the left ventricle.

The heart is enclosed in a serosal sac called the pericardium. The loosely fitting double outer layer consists of the outermost fibrous pericardium, lined by the parietal layer of the serous pericardium.

The pericardium is one of three layers of the heart (other ones being the myocardium and the endocardium); and is the outer layer of the heart. The pericardium is composed of two tissues, the fibrous pericardium and the serous pericardium. The pericardium functions to lubricate the movement of the heart by the action of the pericardial fluid.

The heart has four chambers. Relative to the roles of these chambers, the atria are the receiving chambers, whereas the ventricles are the discharging chambers.

The four chambers of the heart are namely the right atrium, right ventricle, left atrium, and the left ventricle. Venous blood goes to the right atrium via the vena cavas then to the right ventricle via the tricuspid valve; then to the pulmonary circulation via the pulmonary artery where it will be oxygenated. From the pulmonary circulation, the left atrium will receive the oxygenated blood via the pulmonary veins then to the left ventricle via the mitral valve where it will be pumped to the systemic circulation via the aorta.

6 0

3 years ago

Define the 3 major shapes of bacteria

dybincka [34]

CocciThe most common of the 3 shapes of bacteria is cocci, or round bacteria. An example of a bacteria that appears round is Streptococcus. There are several variations of Streptococci, and they are distinguished in part by their arrangement. Some Streptococci exist in pairs, such as Streptococcus pneumonia, which can cause pneumonia. Others are joined in chains. One of the most well-known Streptococci is Group A Beta hemolytic Streptococci. Beta hemolysis appears as a clear area surrounding the colony growing on a blood agar plate. The hemolysis occurs because of a hemolysin the organism emits which breaks down red blood cells. This is useful in distinguishing Group A Beta Strep from other less virulent strains of Streptococci.Another cocci, which can be serious, is Staphylococcus aureus. Staph aureus appears in grape-like clusters under a microscope and has become resistant to many types of antibiotics. A variant of Staph aureus is called methicillin-resistant Staph aureus, which is often found in hospital acquired infections and has mutated due to overuse of antibiotics. It is very difficult to treat methicillin-resistant Staph aureus (MRSA).BacilliAnother of the 3 shapes of bacteria is bacilli. These are rod shaped, gram positive organisms. One of the most commonly known bacilli is Bacillus antracis, which is the bacteria that can cause anthrax. Bacillus antracis, as well as other strains of Bacillus, are typically found in soil and are usually not harmful to humans.Lactobacillus is another common gram positive bacilli found in many probiotics. It is helpful for the digestive system, providing what are considered "good" bacteria for healthy digestion. There are a number of varieties of Lactobacilli found in probiotics, such as Kiefer.SpirillumSpirillum are spiral shaped bacteria that stain gram negative. They move with tufts of flagella located at both ends. One of the most common spirillum that affects humans is Treponema pallidum, which causes syphilis. Most spirilla affect animals; however, there is a variety that can cause rat bite fever in humans.

8 0

3 years ago

According to this model, at which point is the storm least likely to make landfall?

strojnjashka [21]

Answer: I think it’s c

Explanation:

It a common pattern for hurricanes in that area and it’s where the line leads

4 0

4 years ago