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Lana71 [14]
2 years ago
14

Help help help help help hep

Biology
1 answer:
liberstina [14]2 years ago
7 0

Answer:

Your question is not clear

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Why is the quadrat method useful for estimating snail populations? Do you think it would work for fish populations?
SpyIntel [72]

Quadrat method is used for estimating the number of individuals in an area. In this method, a large square area on the ground or water surface is marked, call it an enclave. The number of animals present in this enclave is counted. Then by assuming that the animals are less migratory and are uniformly distributed, their number for a large area is estimated by the use of unitary method of calculation. Example a 4 square feet area has 2 snails, then a 1000 square feet area will have (1000 x 2)/4, i.e, 500 snails in it. Fishes can be counted using this method only if they are confined in a small water body like a lake or a pond. Rivers are flowing so the fishes may move along its length which can give us an underestimate or an overestimate of their numbers. Sea has its depth and huge area, and fishes can be moving randomly in it. Hence this method will not work for river and sea fishes.

5 0
3 years ago
In the laboratory, you have a beaker containing 100 milliliters (mL) of NaOH solution at pH = 13. Into this beaker, you carefull
romanna [79]

Answer:

d. The pH of the beaker`s contents will decrease.

Explanation:

Since the new substance is an acid and has a very low pH, that is 1. it will reduce a little bit the pH of the original base (NaOH). Some ions of hydrogen of the acid are going to react with the hydroxyl group of the sodium hydroxide to form water.

Since the differences of the volume is big, only a small part of the base is going to be neutralize, but at the end, the final pH of the solution is still going to be  a base.

Hope this information is useful.

3 0
3 years ago
Why might introduction of exotic species disrupt and ecosystem?
Tanya [424]
Exotic species do not have a niche in the ecosystem that they are in. Therefore they take up resources that native species rely on to survive. Exotic species also have no natural predators in that environment causing them to flourish and multiply quickly. 
8 0
3 years ago
What is the complementary sequence corresponding to the dna fragment gataca?
prohojiy [21]
I believe this is called CTAATGT. Hope this helps.
3 0
3 years ago
Why do scientists think it is necessary to develop new ways to create ethanol
Elena L [17]

Answer:

Due to the cost and resource input (specially the land) required for producing ethanol

Explanation:

In current time most of the ethanol is produced by fermenting corn, sugarcane or other plants at high temperature. In this process of fermentation, liquid bio fuel is produced.  

These plants and crops require large area for cultivation and production along with huge inputs of fertilizers and water. As per an estimate , 3 gallons of ethanol require bushel of corn that intakes 800 gallons of water which is a huge cost to any nation or individual  

Hence, scientist are  finding new ways to create ethanol

3 0
2 years ago
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