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3 years ago

Question 6(Multiple Choice Worth 2 points)

Biology

2 answers:

Scilla [17]3 years ago

5 0

Spraying crop fields with pesticides is the common source of groundwater pollution.

Explanation:

Groundwater is naturally found in aquifers or geological water structures which stores water deep in the ground.

The most common contaminant of groundwater is spillage and seepage of excessive chemicals from industries and agriculture.

Agriculture which is done in large scale in many parts of the world implies the use of a large number of chemicals in the form of pesticides, weedicides, fertilizers, growth promoters etc. these are either sprayed as foliage sprays or added to the ground directly for the roots to absorb.

The excess chemicals applied to enter the ground surface and mix with the surface water and enter into the ground and mix with the groundwater. Thus the entire natural aquifer in that area becomes easily contaminated with chemicals.

Reika [66]3 years ago

3 0

The common source of groundwater pollution is done by spraying crop fields with pesticides.

Answer: Option C

Explanation:

The ground water pollution is the mixing up of pollutant in the water which lies below the ground and is potable in nature. This pollution has the commonest source of pollutant by the pesticides.

The crop fields when sprayed for pests with pesticides in order to kill the pests on crop, contaminates the crop as well as the ground at the same time. These are its disadvantages.

The ground being contaminated on ploughing or by leaching gets the pollutant into the water table. Plant on the other hand on decaying leaves the pesticide into the ground which in turns goes into the under ground water.

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Glucose,fructose,and sucrose are all carbohydrates.what elements make up all carbohydrates

alexdok [17]

All carbohydrates, including sugar, therefore contain the same three elements:carbon, hydrogen and oxygen.

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3 years ago

Ian experiences pain in his leg after a fall, so he goes to the doctor. After an exam, the doctor explains to Ian that he has in

Anna11 [10]

Answer:

Tendon or a connective tissue

Explanation:

Tendons are a type of connective tissue that attaches muscle to bones. They are strong, fibrous and flexible. They also attach muscles to other organs. Tendons have a high tensile strength which is useful to withstand muscle contractions. They are made up of bundles of connective tissue that contribute to its strength.

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3 years ago

How long does it take for a water bottle to decompose?.

Elodia [21]

Answer:

450 years

Explanation:

well, according to some researchers, They estimate that due to the PET used in objects like plastic bags, plastic water bottles and plastic straws, it could take upwards of 450 years to decompose.

8 0

2 years ago

A situation in which the coefficient of coincidence is greater than 1.0 would indicate that: A. no double crossovers were found

damaskus [11]

Answer:

B. there were more double crossovers in the progeny than would be expected based on probability

Explanation:

Crossing over or recombination can be defined as the exchange of genetic material between homologous chromosomes during meiosis. Moreover, the coefficient of coincidence is the number of double recombinants found in the progeny. The coefficient of coincidence can be estimated by the following equation:

Coefficient of coincidence (COC) = ADRF / EDRF

where ADRF = Actual Double Recombinant Frequency

and EDRF = Expected Double Recombinant Frequency

In the case above described, ADFR is higher than EDRF, and therefore COC will be higher than 1.

3 0

2 years ago

The front leg of a cat, the front flipper of a dolphin, and the wing of a bat have the same structure and order of bones. These

Kay [80]

Answer:

The bones are homologous structures

Explanation:

Homologous structures are the structure which are found similar in appearance in different organisms.

The homologous structures in different organism shows that they shared a common ancestor or they diverged from a common ancestor during course of evolution that is these homologous structures are the result of the divergent evolution.

In the given question, the bat, dolphin and the cat shows the same structure of bone which indicates that they have evolved from a common ancestor and is true as they all belong to mammals.

Thus, the bones are homologous structures is correct.

6 0

3 years ago