The answer is; true
These microbes are usually adapted to their environment and this is why they are found in virtually all ecosystems. You will find bacteria even at the bottom of deep ocean beds deep and in geothermal vents, hypersaline water and very cold regions (such as polar regions). Fungi which vary widely in size from microscopically small to the largest organisms such as mushrooms are also found in virtually all environments on earth. They are nonetheless different species of these groups adapted to their environments.
b. lac repressor
c. RNA polymerase
d. lac repressor and RNA polymerase
e. cAMP receptor protein (CRP) and RNA polymerase
Answer:
e. cAMP receptor protein (CRP) and RNA polymerase.
Explanation:
Lac operon is a type of inducible operon which can be controlled positively or negatively. A positively controlled operon is the one which is controlled through an activator while negatively controlled is the one which is controlled through a repressor. The inducer in case of lac operon is cAMP receptor protein (CRP) which forms a dimer and makes interaction in the upstream region of promoter of lac operon so as to facilitate transcription. Repressor in case of lac operon is a tetrameric protein which binds the operator region of lac operon and prevents gene expression by restricting RNA polymerase from facilitating transcription.
When lactose is present in high concentrations and glucose is in low concentration in the culture medium for a wild type E. coli strain, the control will be negative as well as positive.
If the glucose level is very low, an enzyme known as adenylyl cyclase becomes active and produces cAMP, this cAMP then forms a dimer by interacting with CRP to form a cAMP-CRP dimer which acts as an activator and binds to the upstream of lac promoter and helps RNA polymerase to initiate transcription.
Also because of high lactose concentration, lactose isomerises into allolactose which acts as an inducer and interacts with repressor to remove it from operator region. As soon as repressor is removed from the operator region, RNA polymerase starts transcription.
B. Schwann
C. Hooke
D. Leeuwenhoek
Answer:
C
Explanation:
A. stains with basic dye methylene blue, has large amounts of histamine in granules, and facilitates allergic responses and inflammation
___basophil
B. stains with acidic dye eosin, has histamine and major basic protein in granules, and facilitates responses to protozoa and helminths
___macrophage
C. recognizes abnormal cells, binds to them, and releases perforin and granzyme molecules, which induce apoptosis
___eosinophil
D. large agranular phagocyte that resides in tissues such as the brain and lungs
Answer:
1. A natural killer cell identifies unusual cells, combines with them, and discharges perforin and molecules of granzyme that stimulates apoptosis.
2. A basophil comprises huge concentrations of histamine in granules, gets stain with basic dye methylene blue, and helps in inflammation and allergic reactions.
3. A macrophage refers to a huge agranular phagocyte, which is found within the tissues like lungs and brain.
4. An eosinophil comprises histamine and major basic protein in granules gets stain with acidic dye eosin and helps in reactions against the helminths and protozoa.
The natural killer cell recognizes and destroys abnormal cells, the basophil facilitates allergic responses and inflammation, the macrophage is a large cell that resides in tissues, and the eosinophil facilitates responses to certain parasites.
Here is the correct match for each cell type with its description:
#SPJ3
Answer:
1.The Winogradsky section is a straightforward gadget for refined an enormous decent variety of microorganisms.The gadget is a segment of lake mud and water blended in with a carbon source, for example, paper which contains cellulose, darkened marshmallows or egg-shells which contains calcium carbonate.
2. carbon is important for providing cellulose for winogradsky column.
3.calcium sulphate in the form of gypsum or plaster of paris, craft or garden stores is used. green suphur bacterias and purple sulphur bacterias are formed after 2 to 6 weeks.
4.A hydrogen sulfide slope is created from the base to top in a Winogradsky section since sulfur-decreasing microorganisms like Desulfovibrio (microbes that utilizes maturation side-effects like Ethanol and Organic acids from Clostridium as a carbon source by means of anaerobic breath) produce a lot of H2S as a result of anaerobic breath. The H2S gradually diffuses upwards and is utilized by different life forms. The explanation the angle is higher at the base is on the grounds that anaerobic microscopic organisms like Desulfovibrio can't endure where O2 is available. The further down in a Winogradsky section the more anaerobic the earth. Along these lines, bigger measures of H2S are created at base of segment in light of the fact that there is a higher grouping of anaerobic microorganisms that produce H2S at the base as side-effect of their anaerobic breath process
5.Rather than utilizing water to photosynthesize, similar to plants and cyanobacteria, purple sulfur microscopic organisms use hydrogen sulfide as their decreasing operator, which is the reason they radiate sulfur as opposed to oxygen.
Explanation:
Answer:
50% long black hair and 50% short hair
Explanation:
Attatched is a screenshot of a punnett square that shows the possibilities of the offspring having long or short hair. In short, the genetics of long black hair only need one big "L", while the genetics of short hair need to have 2 short "l"s. So when we draw the punnett square and combine the genetics, we get 50% have Llbb, and 50% have llbb
Answer:
Towards the southern of the sound
Explanation:
As the motion of the source of sound is moving,the percieved sound frequency varies .this is known as Doppler effect.the sound waves emited by the sources tends to bunch up in front of the source and spread out behind the source.
Since the falcon is moving towards the sound,the frequency increases and so does the pitch of the sound