Answer:
Explanation:
A strainer is a device that is used to remove foreign/specific "dirt" from a liquid (usually when flowing). Strainers usually have holes just like a sieve except that this time, <u>it separates </u><u>dirt</u><u> (tiny solids) from the liquid unlike a sieve that separates solid particles of different sizes</u>.
It should however be noted that sometimes the strainer is designed to remove a valuable "dirt" from the flowing liquid.
Answer:
organic amines contain nitrogen atoms, N, that are singly-bonded to at least one carbon atom.
Explanation:
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<span>These are:
1. <u>Number of microbes</u>: if there is a lot of microbes, then more time is needed to kill all of them.
2. <u>Characteristics of microbes</u>: some microbes have resistance genes, so they will not react to agents they are resistant to; some microbes have protective structures so treatment will be inhibited.
3. <u>Time of exposure</u>: different agents will need different time to kill microbes.
4. <u>Environment</u>: the effect of temperature, pH, organics both on microbes and agents.</span>
Answer:
Option B, Most communities never become completely stable
Explanation:
In an ecological succession, most of the species are unstable and they keep on changing continuously. The succession is primarily of two types –
a) Primary Succession – In this, community of species occur on a new habitat which had been never occupied earlier. Or it can be said that it is entirely a new habitat.
b) Secondary Succession – In this, community of species occur in a habitat where earlier life existed but it was disturbed or damaged by some environmental condition.
Hence , the correct answer is option B
I wish i could help but im in 8th grade so im not sure about that :/
I wish you luck!
