BIOLOGY HIGH SCHOOL

Which one of these helps create water pollution?a. carbon dioxide
b. chlorofluorocarbons
c. nitrates
d. dust particles

Answers

Answer 1
Answer:

Answer:

The correct answer is option c. "nitrates".

Explanation:

Nitrates are among the most common contaminants and contributors of water pollution, particularly in rural areas. The presence of nitrates in drinking water is one serious problem because it could cause methemoglobinemia, or the "blue baby" disease. Additionally, the presence of nitrates in groundwater is related with the presence of other contaminants, such as bacteria or pesticides.
Answer 2
Answer: a. carbon dioxide It goes into the atmosphere and theres carbon emissions

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Which animal of the coniferous forest eats plants and bark during the winter?
Groundwater is in danger partially due toA. sinkhole formation.B. the building of dams.C. a slow recharge rate.D. infiltration by acidic water.
In coupled reactions, the energy released by a(n) ____________ is used to drive a(n) ____________ . ATP breakdown is often coupled to cellular reactions that require an input of energy.
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Which of these is most likely to produce heavy metal waste? A. Leather tannery
B. Medical center
C. Paper mill
D. Oil refinery

Answers

Answer:

Option A, Leather tannery

Explanation:

In a leather industry, chromium is one of the heavy metals that are used in large amount.  

Along with tannery, Chromium is also used in electroplating, and metallurgical industries.  

The water coming out of these tannery has high content of chromium ion (Cr6+) generally ranging between 100–200 mg/L. This chromium rich water needs sufficient treatment before discharge or else it would cause bio magnification effect

Hence, option A is correct

C. A paper mill (APEX)

To what extent can very large earthquakes be predicted

Answers

Scientists have tried lots of different ways of predicting earthquakes, but none have been successful. They haven't been able to find a signal for earthquakes( there is no obvious sign to say that an earthquake is coming very soon). They do have a pretty good idea of where an earthquake is most likely to hit, but they still can't predict exactly when it will happen.

However, the probability of a future earthquake can be calculated, based on scientific data. Scientists estimate that the probability of a major earthquake occurring in the San Francisco Bay area over the next 30 years is 67%.

Which of the following best describes the function for the organelle labelled ‘D’?(a) moves substances across the cell membrane
(b) transports materials around the cell
(c) controls all cell activities
(d) packages materials for export from the cell

Answers

a) moves  substances across the cell membrane

When an organism is asexually it usually has

Answers

It has an organism that is born through asexual reproduction only has the DNA from the one parent. In fact,the typically males have a pens that deposits speed into vaginal of the female

Stephan predicted that the seeds will start to grow faster if an electric current traveled through the soil in which they were planted. Is it A. Recognize a problem.
B. Form a hypothesis
C. Test the hypothesis with an experiment
or
D. Draw conclusions

Answers

B. Form a hypothesis because he is predicting something or making an educated guess

During the production of gametes, the chromosomes condense, and the chromatids of homologous chromosomes cross over to form new allele combinations, which of thefollowing best describes the life cycle of this cell? 1, The cell will separate into two daughter cells next, and cytokinesis will occur.
2The cell is in prophase I of meiosis and will enter metaphase I next.

3The cell will make a copy of each chromosomein order to form diploid daughter cells.s o
4The cell is in interphase II of meiosis and will enter prophase II next

Answers

2The cell is in prophase I of meiosis and will enter metaphase I next. Prophase I of meiosis is when crossing over of tetrads at chiasma occurs to create genetic variation.
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