Which of the following best describes passive immunity?

Mrs. gray, a 50-year-old mother of seven children, is complaining of dull, aching pains in her legs. she reports that the pain h

BaLLatris [955]

The answer is; Varicosities are recognized by the enlargement of the veins. Superficial veins are most likely involved because they have little support from surrounding tissues. The veins have become tortuous and dilated because of incompetent valves that allow the blood to pool, stretching the vein walls. The likely cause in this patient's case is her pregnancies, because the enlarged uterus exerts download pressure on groin vessels, restricting return blood flow to the heart.

8 0

3 years ago

What is the watery medium in which all the organelles float?

Irina-Kira [14]

Organelles float around in the cytoplasm.

6 0

3 years ago

How is Gel –Electrophoresis used in the fields of Medicine, Agriculture and Forensic Science

Andreyy89

It's is used by putting the lager chromosomes on the bottom and the smaller ones on the top so when they get DNA sample of something they can she if some thing is closely related or not

6 0

3 years ago

The organisms that harness non-biological energy and convert it to biologically relevant/useful energy are called __ 1 __ _. The

mamaluj [8]

Answer:

The organisms that harness non-biological energy and convert it to biologically relevant/useful energy are called __autotrophos or producers_. The organisms that consume these are called _herbivores_ (it should end in -ores) which occur at the __second_ trophic level. The number of trophic levels that any ecological system will primarily dependent on the _consumer_ organisms.

Explanation:

In the trophic web occurs energy transference through organisms occupying different levels in the chain. Each level feeds on the preceding one and becomes food for the next one. The first link is occupied by autotroph organisms, which are the producer. The following links are the consumers: herbivores are primary consumers and feed on producers. Carnivores are secondary consumers and feed on herbivores, and so on. The last links are the decomposers, microorganisms that act on dead animals degrading organic matter.

Every link has an effect on the superior links and the immediately anterior link, meaning that whenever one of the links changes, the other ones will be affected.

Autotrophs or producers synthesize inorganic substances, such as light, and turn them into organic matter according to their own needs. These organisms are photoautotrophs, such as plants, or chemoautotrophs. They occur at the first trophic level.

Heterotrophs are those incapable of producing their own organic matter, so they feed on producers, depending on them to get proteins and energy. In the trophic chain, heterotrophic organisms occupy the first, second, or third consumer level, after producers. These animals can be herbivorous, carnivorous, omnivorous, hematophagous, ichthyophagous, and etcetera. All of them depend on autotrophic organisms.

In the particular case of herbivores, they occur at the second throphic level feeding on producers and being eaten by carnivores.

In general, most trophic chains are composed of 4 or 5 levels, depending on the number of consumers present, and the energy transference between levels.

8 0

2 years ago

Which of the following is an example of adhesion in organisms

12345 [234]

Adhesion is defined as a component of water , an attraction that occurs between two different substances like water and the cell walls of plant cells.

For instance:

A tree requires to be able to transport water from the roots to the leaves atop the tree over a long distance. The Water molecules will stick to the xylem in the method called as adhesion.

4 0

3 years ago