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Rainbow [258]
3 years ago
14

Which best describes organisms of the Precambrian era?

Biology
1 answer:
otez555 [7]3 years ago
3 0
Out of the choices given, the best way to describe the organisms of the Precambrian era are they were single-celled organisms and soft, boneless animals. One thing from that time that we still have today is the jellyfish. The correct answer is C. 
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The first successful treatment for bipolar disorder, and still the most common one, is lithium salts.
kvv77 [185]
True. That is the answer. 
8 0
3 years ago
A person who is heterozygous for hair type will have a phenotype of wavy hair. If one parent has wavy hair and the other parent
snow_tiger [21]

Answer:

C) 50%

Explanation:

If wavy hair is heterozygous then wavy is dominent and curly is recessive. So the alles for wavy would be Ww and for curly it would be ww. Put that on a punnet square and it is 50-50

8 0
3 years ago
What is the approximate percentage of guanine in the DNA genome of E. coli?
Nadya [2.5K]

Answer:

25%

Explanation:

<em>The approximate proportion of G + C content in the genome of E. coli has been reported to be 50%. According to Chargaff's rule, the amount of guanine in any DNA must be approximately equal to the amount of cytosine. </em>Hence,

if G + C = 50 and G = C,

then

G = C = 25

Therefore, the approximate percentage of guanine in the genome of <em>E. coli </em>would be 25.

6 0
3 years ago
PLEASE HELP ME AND EXPLAIN!!!<br>THANK U FOR THE HELP!!!
sergij07 [2.7K]

An example of a false negative is taking an HIV test and having the test come back negative to say the patient is clean, but in reality they have HIV. Another example of a false negative is a woman taking a pregnancy test saying "not pregnant" (i.e. test is negative), but she actually is pregnant. Between those two examples, it is better to have a false negative pregnancy test because it is non life threatening.

A false positive example would be getting bad news you have cancer, when you actually don't have cancer. Another false positive example is a test saying you have a cold virus, when in actuality you don't. The first example mentioned would have the patient likely go through intense chemo treatments which would greatly affect their livelihood. The second example is a more harmless false positive as it would involve at most a flu shot if anything.

6 0
3 years ago
I need someone to do a very big task for me in biology..I will give brainlist. The teask i need is the first one in my profile.
frosja888 [35]

Answer:

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Explanation:

8 0
3 years ago
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