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Biology

1 answer:

Sauron [17]3 years ago

3 0

Water pollution comes from many sources. One of the biggest sources is runoff. Runoff moves over the surface of the land and picks up chemicals such as fertilizer (contains vital nutrients such as nitrogen, phosphorous, and potassium - NPK) from agricultural fields, lawns, and golf courses. It carries the chemicals to bodies of water. The added nutrients from fertilizer often cause the excessive growth of algae, creating algal blooms which are temporary phenomena because the large population of algae use up the available nutrients (Figure 2.4c). When the algae die, the decomposing bacteria use up oxygen in the water so that other aquatic organisms cannot survive. This has occurred over large areas of the ocean, creating dead zones, where low oxygen levels have killed all ocean life. A very large dead zone exists in the Gulf of Mexico. Measures that can help prevent these problems include cutting down on fertilizer use. Preserving wetlands also helps because wetlands filter runoff.

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In humans, the inheritance of what is best explained as being codominant

ArbitrLikvidat [17]

Answer:

height

Explanation:

7 0

2 years ago

Punnett Squares are used by geneticists to determine the likely genotypes of the offspring of two parents.

PilotLPTM [1.2K]

That's correct - it's a square where on one axis, the paternal allele (allele = one of the possible forms of the same gene), and on another the maternal allele is listed. Often, it's also indicated whether an allele is recessive or dominant.

Then, in the table that results, all the possible "combinations" of allele between the paternal and maternal party are created. If you count how often a certain combination appears, it indicates the likelihood of that combination.
See the picture (though it is directly from Wikipedia, please note). The likelihood of BB is 25%, of Bb is 50%, and of bb 25%.

6 0

3 years ago

You are designing an artificial drug-delivery cell that can penetrate animal cells. Which protist structures should provide the

slavikrds [6]

<h2>Apical complex</h2>

Explanation:

A group of cytoskeletal structures and related layer limited organelles found at the foremost finish of grown-up commit intracellular protozoan parasites in the phylum Apicomplexa. The apical complex is engaged with connection to and infiltration of the host cell and in parasite multiplication.
Apicomplexans : Ciliates are pretty cool, but they're not the only group of alveolates out there. Next, we've got the apicomplexans. This group is characterized by an asymmetrical collection of alveoli at one end of the cell, which is called the apical complex.
the apical complex has shaped the way it is because it helps the cell latch onto and infects other cells.That's right, apicomplexans are parasitic. There are 4,000 known species of apicomplexans, all of them parasitic, and some of them pretty nasty.

7 0

3 years ago

Insertion and deletion mutations are said to cause shifts in the reading gram of the mRNA. Substitution mutations do not cause t

PSYCHO15rus [73]

Explanation:

A frameshift mutation is an insertion or deletion in a sequence of DNA which disrupts the way the code is read. It occurs when the codons undergo a disruption through the deletion or insertion of one or multiple nucleotides (given that the number removed or added are not multiples of 3) - this alters the open reading frame; the amino acids produced through translation simply occur in a different sequence.

Further Explanation:

During the process of cell division, spontaneous changes within the genome can arise. These mutations are errors occur when copies of the DNA within the cell are made; mutations may range from small changes called single nucleotide polymorphisms, to large scale deletions, and additions which span multiple genes. There are two types:

somatic: these only occur within certain cells, and arise from environmental factors such as UV light
hereditary: occur within germ cells of the parent and later the fertilized egg which forms a zygote; these are present within all cells of the new organism.

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly

4 0

3 years ago

Which of these would generally NOT be considered part of a watershed?

Leno4ka [110]

Which of what? I need more information to decipher that.

4 0

3 years ago