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babymother [125]
3 years ago
5

Which of the following is a qualitative observation?

Biology
2 answers:
wel3 years ago
7 0

Answer:

C

Explanation:

Observing is looking or listening not weighing or measuring. So the only possible answer is C.

stepladder [879]3 years ago
6 0

Answer:

c

Explanation:

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For a person standing on earth’s surface, the force of gravity is greater at the poles than near the equator because gravity inc
kow [346]

Answer:

C. Magnetic poles become nearer

Explanation:

3 0
3 years ago
1.The Punnett square above shows a cross between two sweet pea plants in Mendel's
jenyasd209 [6]
1) 75% purple flowered and 25% white flowered. If you complete the punnett square, you'll see the combinations are PP, Pp, Pp, and pp. The capital P is dominant (purple), so you know that 3/4 combinations will be purple flowers.

2) 50%. There is a 50% chance Grace will have Huntington's disease because since the disease is dominant, it is capital letter H. When you make a punnett square, you'll see the combinations are Hh, Hh, hh, and hh. There is a 50% chance Grace will have the Hh combination.

3) Protein. Protein is the only bio-molecule out of the 4 options, and the diagram shows a protein being made.

4) Transcription. Transcription is when the genetic message from DNA is transcripted onto mRNA.

5 0
3 years ago
Read 2 more answers
"A technologist in a tissue bank who performed HLA typing by DNA analysis was asked to bank all DNA extracted from specimens rec
professor190 [17]

Explanation:

The DNA could be dried -through the process of lyophilization- or stored, as a precipitate of ethanol, in liquid nitrogen (temperatures below -80 degrees Celsius). The aim is to reduce water in the stored samples as much as possible because the water can be involved in natural hydrolytic reactions (depurination, depyrimidination, deamination, and hydrolytic cleavage) that could degrade the nucleic acids of the DNA.

If the DNA is stored while being used regularly it is not advisable to store it as a precipitate of ethanol. It should be stored in aqueous form but in a slightly alkaline pH of about 8.5 to prevent acid-catalysed degradation processes.

Learn More:

For more on DNA storage check out;

brainly.com/question/8841070

brainly.com/question/13435389

#LearnWithBrainly

4 0
3 years ago
The nitrogen cycle is most directly dependent upon-
vovangra [49]

Answer:

B) Nitrogen-fixing bacteria and lightning

Explanation:

Nitrogen cycle is the natural process in which atmospheric nitrogen is converted into nitrite and nitrate with the help of bacteria.

Nitrogen cycle is directly dependent on nitrogen-fixing bacteria and lightning.

As bacteria are responsible for most of the chemical conversion in the nitrogen cycle such as nitrogen fixation (first step) is done by soil bacteria (Cyanobacteria) that form ammonia, which is toxic to plants; nitrification in which ammonia is converted into nitrites and nitrates with the help of Nitrobacter and denitrification bacteria involve Pseudomonas, and Achromobacter which convert nitrite and nitrate into nitrogen.

The lightning breaks nitrogen molecules and allow  it to combine with oxygen in atmosphere which further dissolve in rain and form nitrates.

Hence, the nitrogen cycle is most directly dependent upon nitrogen-fixing bacteria and lightning and the correct option is B.

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3 years ago
Half of the polar bears in a small population die. This population may experience changes due to what
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Declone numbdr of polar bear
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