BIOLOGY HIGH SCHOOL

Which of the following is the best example of an open system?A. a vacuum bottle
B.An Anthill
C. A sealed Box
D.The moon

Answers

Answer 1
Answer:

Answer:

B.) An anthill

Explanation:

trust me

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if a cell is placed inside a solution that has a higher concentration of solute than on the inside of the cell what can be said about the movement of water
Which data would be best analyzed and communicated using a histogram
While an important source of freshwater, groundwater is not as widely used as rivers and springs.a. True b. False
A 21-year-old female was lost in the woods for several hours. The ambient temperature is 25 degrees Fahrenheit. She is lethargic and confused. The skin on her hands is waxy and white. What should you do

Why is RNA necessary to act as messenger?

Answers

To send instructions given by DNA to the rest of the body.
Because it is the one on which the DNA info is copied, and then it goes to the ribosome and brings him the "map" to synthesize the proteins encoded in your DNA.

On a small island, three separate phenotypes of a single species of cherry tree occur- small, medium, and large seeds. A small population of mice is introduced to the island, The mice are the only organisms that eat cherries on the island. When they eat a cherry, they digest it and excrete the pit or seed completely undigested at another location. The mice choose the larger cherries with medium and large seeds and leave the smallest ones uneaten. a. What type of selection, if any, is occurring here? b. Provide support for your answer. c. Graph what the population of cherry trees will look like over time. Make sure to label your axes.

Answers

a. Natural selection is occurring in this scenario.
b. The larger cherries with medium and large seeds are being selectively favored by the mice, as they are the ones being eaten and dispersed to new locations. This leads to an increase in the frequency of the medium and large seed phenotypes in the population over time.
c. Unfortunately, as a text-based AI, I am unable to create visual graphs. However, over time, the population of cherry trees would likely show an increase in the medium and large seed phenotypes, while the small seed phenotype would decrease in frequency. The x-axis could represent time, and the y-axis could represent the proportion or frequency of each seed phenotype in the population.

Mammalian limbs are adapted for a variety of methods of food gathering. true or false

Answers

This is true. Mammals seem to have been thriving in the different environments around Earth. One good reason why this has happened has been because they are very well adapted to the challenges which their environment poses to them. With that said, this also means they are very good at gathering food for themselves which enables their survival. 

Why might a scientist repeat an experiment if he/she didn't make a mistake in the first one? An experiment should be repeated toA) increase income for increased work.
B) prove how good of a scientist you are.
C) double check your results.
D) show how smart you are.

Answers

Experiments are often replicated or repeated even when no obvious mistake was visible. This is to establish how variable results are. Statistically, multiple runs are used to determine the variance or standard deviation around the average value. The best answer for this is choice C, to double check results.

Answer:

C

Explanation:

Describe how a named type of microorganism can be used to produce insulin on a commercial scale.

Answers

Answer:

The development in the field of genetic engineering allowed the production of insulin in E. coli and yeast, which have been approved for therapeutic applications in human by FDA [14,15]. Nowadays, recombinant human insulin is mainly produced either in E. coli or Saccharomyces cerevisiae.

Answer: E.coli or Escherichia coli

Explanation:

Procedure

1. Obtain the segment of DNA in a human chromosome that contains insulin gene. Cut the gene using a restriction enzyme. This enzyme cuts the restriction site at the two ends of the gene to produce sticky ends. Each sticky end is a single strand sequence of DNA bases. These bases can pair with complementary bases to form a double strand.
2.Obtain a plasmid from a bacterium. Cut the plasmid with same restriction enzyme. This produces 'sticky ends' complementary to the ends of the Insulin gene.
3. Mix the plasmid with the DNA segment containing the human insulin gene. The human insulin gene will bind to their sticky ends. Add the enzyme DNA ligase to seal the human plasmid containing DNA from two different organisms is recombinant plasmid
4. Mix the recombinant plasmid with E.coli bacterium. Apply temporary electric shock. This opens pores of cell surface membrane of the bacterium for the plasmid to enter.
5.The transgenic bacterium will use the new gene to make insulin

The insulin protein has to be extracted and purified before it can be used

Identify two spiders in united states whose bites are most poisonous

Answers

The two spiders in United States that are poisonous: Black widow (southern and western) prefer staying hidden in sheds, garages or piles of debris. The female's bite is most dangerous. The venom of these spiders is very potent.
Brown recluse (southern and mid western states) range in color from cream to very dark brown; have six eyes; are known to occasionally bite humans, injecting their poisonous venom into the blood stream.
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If an atom like aluminum becomes an ion by losing 3 electrons, what is thecharge on the ion?1+2+3+3-
Why are grassland and forest soils good for farming?A. A layer of permafrost prevents the decay of organic material that enriches the soil. B. Too much water promotes chemical weathering and washes away nutrients. C. There is enough water to promote chemical weathering, but not enough to wash away nutrients. D. There is not enough rainfall to promote chemical weathering or retaining nutrients.
Biome under which Qwaqwa falls,support your answer ?
Fungus-like protists are autotrophs that absorb nutrients from dead or decaying organic matter.