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Delicious77 [7]
3 years ago
9

Which zone has proven to be the most difficult for marine biologists to explore?

Biology
1 answer:
a_sh-v [17]3 years ago
6 0

Answer:

Abyssal Zone

Explanation:

PLZ MARK BRAINLIEST

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Potassium has a half-life of 12 hours. What fraction of a 100g sample is left after 48 hours
EastWind [94]

Answer:

After 48 hours amount left = 6.25 g

Explanation:

Given data:

Half life of potassium = 12 hours

Total mass = 100 g

Mass left after 48 hours = ?

Solution:

Number of half lives passed:

Number of half lives = Time elapsed / half life

Number of half lives = 48 hours/ 12 hours

Number of half lives = 4

At time zero = 100 g

At first half life = 100 g/ 2 = 50 g

At 2nd half life = 50 g/2 = 25 g

At 3rd half life = 25 g/2 = 12.5g

At 4th half life = 12.5 g/2 = 6.25 g

4 0
3 years ago
A certain Drosophila protein-encoding gene has one intron. If a large sample of null alleles of this gene is examined, will any
Alex

Answer:

a) Yes

b) Yes

c) Yes

d) Yes

Explanation:

a. In the exons?

Yes mutant site will be expected. It will transcript-ed as well and it can be a polypeptide depending on the mutation type.

b. In the intron?

Yes mutant site will be expected. It will be transcript-ed as well and it cannot be a  polypeptide  

c. In the promoter?

Yes mutant site will be expected. It will not be transcript-ed and it cannot be a  polypeptide

d. In the intron-exon boundary?

Yes mutant site will be expected. It will be transcript-ed and it cannot be a  polypeptide

3 0
3 years ago
A single strand of dna helic has the code cgctaa. Which would be the complemntary code on the other strand of the helix
Damm [24]
It would be GCGATT. C always compliments G and A always compliments T in the case of DNA coding
6 0
3 years ago
In some areas of Florida, manatees gather near spring waters during cold weather because the temperature of the springs is alway
Alexxx [7]
From the data, the manatee population obviously increased after the regulations went into affect  and the deaths due to watercraft reduced from 25 to 8 after the regulations were put into effect. The population increased by 165% from 1980=-2010 and the drop in deaths due to watercraft decreased by 
68%.So this is not a direct correlation but at least it shows that the watercraft deaths decreased significantly. Since the population increased at a greater rate then it may be that more females were spared so could mate and give birth to that many more manatees.
6 0
3 years ago
Identifying the functions of the structures of the excretory system:
aev [14]

Answer:

A Carries urine to the bladder

B excretes urine out of the body

C stores urine temporarily

D produce urine

Explanation:

5 0
3 years ago
Read 2 more answers
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