Facultative and obligate

Jump to navigation Jump to search Aerobic and anaerobic bacteria can be identified by growing them in test tubes of thioglycollate broth: Obligate aerobes need oxygen because they cannot ferment or respire anaerobically. They gather at the top of the tube where the oxygen concentration is highest.

Facultative and obligate

Saturday, November 18, Saturday, February 09, When I was investigating what I should be feeding him, I kept seeing cats described as obligate carnivores. What exactly is an obligate carnivore and how is it different from a regular carnivore? Are there other obligate carnivores besides cats?

People refer to cats as obligate carnivores when they are trying to emphasize the fact that cats are a little different than many other meat-eating predators. Obligate means "by necessity. Restricted to one particularly characteristic mode of life.

Biologically essential for survival. Cats must eat meat, it is an absolute biological necessity. All felidsincluding domestic cats, are obligate carnivores. But, the cat is not alone in being a strict meat-eater. Other mammals that are classed as obligate carnivores include mink, tarsiersdolphins, seals, sea lions and walruses, to name a few.

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Because eating a meat-only diet provides some vitamins and fatty acids in their pre-formed state, cats and many other obligate carnivores have lost the ability to make these amino acids and vitamins in their own bodies the way herbivores or omnivores do. They don't need to since the animals they are eating have already done it for them.

For example, cats require vitamin A in its pre-formed state, they can't make it from beta-carotene the way humans or dogs or rabbits can. They have little ability to form niacin from tryptophan. Simply put, cats must eat meat to live. The digestive systems of cats have also become specifically adapted to eating raw flesh.

They have the shortest digestive tract compared to body size of almost any mammal. Cats have lost some metabolic abilities simply because they don't need them anymore. You don't need to be efficient at breaking down carbohydrates when your diet contains practically none.

One of the defining characteristics of an obligate carnivore is a requirement for a high amount of protein in the diet.

Obligate anaerobes and facultative anaerobes? | Yahoo Answers

Cats meet their blood glucose requirements from gluconeogenesisusing protein, rather than from the breakdown of carbohydrates in their diet. They are so dependent on protein that if their diet is lacking an adequate amount to supply their energy needs, they will break down their own body muscle and organs.Key Difference – Obligate vs Facultative Parasite Parasitism is a kind symbiotic relationship between two organisms in which one is benefited while the other is not.

The parasite is an organism which lives on or within another living organism (host) and obtains nutrients for its nourishment. microbes adhere to surfaces and accumulate when in contact with water.

Facultative and obligate

they are microbial communities encased in slime and they work cooperatively. Oct 16,  · Obligate anaerobes are organisms that die when exposed to oxygen, such as Clostridium tetani and Clostridium botulinum, which cause tetanus and botulism, respectively.

Facultative anaerobes can live in the presence or absence of oxygen, but prefer to use oxygen. Obligate anaerobes are harmed and even killed by the presence of oxygen. Since they cannot use oxygen, they rely on fermentation, anaerobic respiration, anaerobic photosynthesis, or.

pollination (obligate mutualists) provide higher quality pollen than plant species that are facultative mutualists, i.e. pollinated by wind and insects (Hanley et al. ). Last weekend, I hiked in Trinity County along a low-elevation, fire-prone section of the Bigfoot Trail between Highway 3 and Hayfork and was able to witness obligate & facultative seeding in action.. From Field Guide to Manzanitas, Backcountry Press, One-third of manzanita species are facultative . obligate definition: To obligate is to bind by a duty, promise or a contract. (verb) When you require your staff to attend a weekly meeting, this is an example of a time when you obligate the staff to .

An obligate carnivore (or true carnivore) is an animal that "must eat meat in order to thrive (Syufy ). They may eat other foods, such as fruits, honey, grains, . • Strict (obligate) anaerobeStrict (obligate) – Grows in presence of oxygen, but better in anaerobic conditions • Facultative bacteria (facultative anaerobes) – Grows both in presence and absence of oxygen Classification of Medically Important Anaerobes 09 Lecture 13 (Anaerobes.

Obligate | definition of obligate by Medical dictionary