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Oliga [24]
3 years ago
6

Though we hear more about oil spills that occur in acquatic environments, they can also occur on land. Why would it be easier to

contain an oil spill that occurs on land?
A O Oll spills at sea are more likely to contaminate animal habitats than oil spills on land.
B. O Oil spills at sea are more likely to contaminate the atmosphere than oil spills on land
c. oil spills at sea are more likely to cling to plants than than oil spills on land.
D. Oil Spills at sea are more likely to spread with water currents than oil spills on land are through erosion and deposition
Biology
1 answer:
Troyanec [42]3 years ago
4 0
The answer to the question is D
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If we have a plate that has 2500 colonies on it, can we use this plate to calculate CFU's
AleksAgata [21]

No, the solution with bacteria in it needs to be diluted in order to be in the range of 30 – 300.

A colony-forming unit –CFU is used to estimate the number of viable (ability to divide by binary fission) microbes in a sample.  

A sample of microbes is diluted and spread on a plate. Then, the number of colonies is counted, assuming that each colony have grown from a single colony-forming unit, or CFU.

Plates with more than 300 colonies are difficult to count while those with less than 30 colonies give statistically unreliable numbers of colonies to count.

6 0
3 years ago
This chart shows the experimental design of four students who are all observing what kind of bird seed birds tend to eat
IceJOKER [234]

Answer: student 4

Explanation: she is doing the same exact experiment all over again and not changing the things, which can make it even more of an accurate answer

7 0
3 years ago
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Why does acid rain adamage mountain lebrty
Marysya12 [62]

Answer:

When sulfurous, sulfuric, and nitric acids in polluted air and rain react with the calcite in marble and limestone, the calcite dissolves. In exposed areas of buildings and statues, we see roughened surfaces, removal of material, and loss of carved details. Stone surface material may be lost all over or only in spots that are more reactive.

Explanation:

You might expect that sheltered areas of stone buildings and monuments would not be affected by acid precipitation. However, sheltered areas on limestone and marble buildings and monuments show blackened crusts that have peeled off in some places, revealing crumbling stone beneath. This black crust is primarily composed of gypsum, a mineral that forms from the reaction between calcite, water, and sulfuric acid. Gypsum is soluble in water; although it can form anywhere on carbonate stone surfaces that are exposed to sulfur dioxide gas (SO2), it is usually washed away. It remains only on protected surfaces that are not directly washed by the rain.

7 0
3 years ago
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How do we know if there were actually dinos on earth??
alisha [4.7K]

Answer: There are two ways to determine the age of a dinosaur fossil. One is called relative geologic time, which involves deciding whether one dinosaur fossil is older or younger than another. Geologists then measure the proportion of parent and daughter atoms present in the ash crystals to determine the crystal's age.

Explanation:

3 0
3 years ago
Round pea allele R is dominant to wrinkled pea allele r, while yellow pea allele Y is dominant to green pea allele y. Homozygous
allsm [11]

Answer:

RrYy (F1 generation)

Explanation:

This is a typical dihybrid cross involving two genes in the pea plant; one coding for seed colour and the other for seed shape.

According to Mendel's law of dominance, an allele is capable of masking another allele in a gene, the allele that masks or is expressed is called the DOMINANT allele while the allele being masked is called RECESSIVE allele.

Homozygosity of a gene refers to it having the same type of alleles while heterozygosity refers to having different alleles.

In this example, allele for Round (R) and Yellow (Y) pea is dominant over the allele for Wrinkled (r) and green pea respectively.

Homozygous round green pea (RRyy) crossed with Homozygous wrinkled yellow (rrYY) will give rise to a heterozygous round yellow (RrYy) F1 offsprings.

4 0
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