The bacterium is not susceptible to the penicillin family of antibiotics. it contains no plasmids and relatively little peptidoglycan. Adherence to the intestinal lining by this bacterium is due to its possession of a capsule.
Answer:
The temperature is the key factor for prodigiosin production. It has been shown that , S. marcescens can produce this kind of pigment at about 25 °C, which however could not produce the pigments at elevated temperatures, especially till 37 °C
Explanation:
Answer: Fibrin.
Explanation:
Blood clotting refers to a process where clump of blood transform from liquid to gel like, thereby forming clot. These occur when there is cessation of blood loss due to damaged vessels.
When a blood vessel is damaged, it is exposed to some factors which lead to platelet plug formation. The platelet seal together to form a cover on the damaged vessels.
Coagulation occurs where fibrin form a mesh that collect the platelet, blood cells and plasma. The fibrin mesh contract and drain out the fluid content.
A) The colour of a metal is often obtained by the wavelength distribution scale (which is explained below). The radiation of light which the metal fails to absorb, gets reflected. So, the unabsorbed light which is reflected back is visible to us. Hence, we see the color of a metal.
b) A transparent colour of non metal is seen by us, because of the radiant incident ray of light is unabsorbed by the material and is transmitted through it. So, in this case there is no absorption or reflection taking place and hence there is no colour observed.
The colour of any element usually comes from the electron charge transfer between the lower energy to higher energy level by absorption of the ray of light.
Also there are other reasons too, as in organic compounds, the colour is obtained by hyper conjugation which means there is less gap between the higher molecular orbital and lower molecular orbital. So, the absorption of light takes place in these compounds.
The other reason for absorption of light and imparting colours into its substrate is because of the Wavelength distribution. On the wavelength scale, the wavelength of colour that is absorbed is never seen as the same to us, instead we see the complementary colour of it. Example, if we see a red colour, then the colour absorbed by the substrate should be blue.
Answer:
True
Explanation:
Producers are unique set of organisms that begins a food chain or web. They are not dependent on any other organism for energy source (autotrophs). This is because of their ability to capture light energy from sunlight and use it to power the process of making their own food called PHOTOSYNTHESIS.
Photosynthesis is a unique feature of all autotrophic organisms like plants, planktons etc. It involves the use of an inorganic source (CO2) to synthesize organic food in the presence of sunlight. Plants and other producers obtain energy directly from the sun, hence, they are called PRODUCERS because they start a food chain in an ecosystem. Other organisms called CONSUMERS rely on them for energy.
