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kakasveta [241]
3 years ago
9

Question 18 OT 25

Biology
2 answers:
vova2212 [387]3 years ago
8 0

Answer:

A. It is too dangerous to observe directly.

Hope this helps! :D

Scorpion4ik [409]3 years ago
8 0
Scientists use a model because the continents move to slow to observe directly. The continents move about 2in per year along plate boundaries. That 2 inch movement is too small to be observed directly that’s why we use technology in order to measure the movement
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Plasma membranes contain all of the following except
KengaRu [80]
B. 'peripheral proteins' are present, not 'peripheral steroids'. 
4 0
4 years ago
A gene has 2 alleles, R & B, List the possible genotypes? I also need help with questions 5, 6, 7 and 8 please help! Pls loo
irakobra [83]

Answer:

5.) The possible genotypes should be: RR RB BB ( if the could for the same proteins)

6.) Frequency of R: 0.5

7.)Frequency of R: 0.5

8.)Frequency of R: 0.375

Explanation:

5.) If R and B code for the different forms of the same protein then they are only a few possible out comes

6.) First calculate the total alleles in population

allele R= 40

Allele B=40

total allele = R+B= 40+40

=80

Now to find allele R frequency is:

(Total R alleles) / (Total allele in pop)

40/80=

0.5

7.)Calculate the total alleles

Alleles from for R

RR= 10

R=10x 2= 20

Multiply the value by 2 because there are 2 R alleles present in

RB=20

R=20

Number doesn't change there is only 1 R allele

Total R=20+20

=40

Alleles For B

BB=10

B=10×2

=20

Same thing here, two B alleles together so multiple by 2

RB=20

B=20

Total B= 20+20

=40

Total alleles in pop add

40+40

=80

Frequency of R

Total of R/Total Alleles

=40/80

=0.5

8.)Repeat the same thing in 7 but use different numbers

RR=10

R=10x2

=20

RB=10

R=10

Total R= 20+10

=30

5 0
3 years ago
Scientists have believed for many years that light does not penetrate below 200 meters of ocean water. What experimental method
Vesna [10]

Answer:

Scientists should sent a robot and observe the light penetration in the ocean water.

Explanation:

Robots in modern day have become a source of experiments for scientists. Many scientists believe that sending a robot is a better way for research as they can have different observation at different time for a certain period before making a final remark. The robots should be sent in ocean water and observations should be recorded on graph. These observations should be made in different timings to make the research more realistic.

3 0
3 years ago
73. The study of life
Tema [17]
The study of life is called Biology
8 0
3 years ago
: new research is revealing that many cancers involve epigenetic alterations of: the bases a and t coding sequences in the dna o
galben [10]

While genetics corresponds to the study of genes, epigenetics is interested in a "layer" of complementary information that defines how these genes will be used by a cell ... or not.

In other words, epigenetics is the study of changes in gene activity, does not involve modification of the DNA sequence and can be transmitted during cell divisions. Unlike mutations that affect the DNA sequence, epigenetic changes are made on the proteins surrounding the DNA and are reversible.


So the right answer is the proteins around which dna is wrapped

8 0
3 years ago
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