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4 years ago

A scientist collected data using four different instruments. She organized her

Biology

2 answers:

sineoko [7]4 years ago

6 0

Answer: C.

Explanation:

9.8

12.4

11.2

10.4

10.6

Bas_tet [7]4 years ago

3 0

Answer: im sorry i read more of your question and relized its diffrent from mine. if yours says 5.5 instead of 10.9 the answer is 1

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As you learned in the video, non-human primates have light skin covered with fur; biologists hypothesize that the ancestors that

Andreas93 [3]

Answer:

The loss of fur is a protection mechanism for the epithelium that covers us, over the years this method of protection was replaced by the protection provided by melanocytes with their melanin, therefore people who had a low presence of melanin could not survive in the evolution.

Explanation:

The presence of melanocytes and melanin in the skin is what protects it against ultraviolet radiation, over time the human being was affected by solar radiation, thus being one of the causes of bipedalism.

In those humans where melanin is defective or a small number of melanocytes are more predisposed to suffer epithelial pathologies today.

Human evolution then led to hair loss and increased epithelial tonality, causing those who could not have this phenotypic quality to be extinct or deceased.

6 0

4 years ago

What is the definition of chemical weathering?

Zepler [3.9K]

Chemical weathering refers to the erosion or total disintegration of rocks that are caused by chemical reactions and not by mechanical processes. Usually water and other liquid substances causes this to occur. Skyscrapers or buildings are prone to chemical weathering because they are constantly exposed to precipitation and other elements in the atmosphere. In rocks, when this process happens they tend to crumble and form smaller rock pieces. It is important to note that during this stage, the end product is a totally different substance than its original phase.

7 0

4 years ago

Why is silkworm called the queen of insects

vova2212 [387]

Answer:

Silk is a highly economic fiber, with a unit of raw silk worth about twenty times the value of raw cotton. Aside from silk, these insects are used to feed pets, apparently the healthiest natural food source. ... The above economic and health benefits, not an exhaustive list, justifies the title of queen of insects.

4 0

3 years ago

Read 2 more answers

In 1968 how many tons of CFC's were produced in the untied states

Mrac [35]

Answer:

nearly one million tons per year

Explanation:

Midgely would receive the Society of Chemical Industry’s Perkin Medal for this research in 1937; in 1941, he was awarded the Priestley Medal, the American Chemical Society’s highest award, for his contributions to chemistry.

By the early 1970s, CFCs were in widespread use, and worldwide production of the compounds had reached nearly one million tons per year, representing roughly a $500 million slice of the chemical industry.

3 0

3 years ago

In rabbits, short hair is due to a dominant allele, S, and long hair to its recessive allele, s. Black hair is due to a dominant

Natali5045456 [20]

Answer:

SsBB x SsBB

SsBB x SsBb

Explanation:

SS- short hair

ss - long hair

BB- black hair

bb- white hair

Total the number of offspring produced = 2518+817=3335

Where 2518= short haired, black offspring SSBB or SsBb

817= Longed Hair, black offspring ssBB or ssBb

To get the offspring proportion for short hair black offspring

2518/3335×100 = 75.5%

long-haired, blackoffspring =817/3335×100 = 25%

This gives ratio of 3:1 as against the proposed dihybrid phenotypic ratio of Mendel experiment 9:3:3:1

Now, if you remember a dihybrid cross results in 9:3:3:1 phentoype ratio. That is when both parents are heterozygous for both alleles. So we can rule that out since it doesn't match our 3:1 ratio.

Since all the offspring are black , it means one parent is homozygous dominant for black and the other parent is either homozygous or heterozygous for the black allele.

Since the ratio is 3:1, for the hair length

That leaves us with the short hair. Since the ratio is 3:1, both parents are heterozygous for hair length.

Therefore, the possible parental genotype is

SsBB x SsBB

SsBB x SsBb

4 0

3 years ago