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lozanna [386]
3 years ago
13

Population from the phylogenetic tree?

Chemistry
1 answer:
bogdanovich [222]3 years ago
4 0
Mark Brainliest please

Answer :

In my opinion , answer is A
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An investigator proposes a study to determine the clinical relevance of a new assay technique to measure minimal residual diseas
mina [271]

The correct answer is D. Assent of the child and permission of both parents are required.

Explanation:

In any research study, it is required to ask for the assent of the participants, no matter if the risk is low, which is established by the Institutional Review Board or IRB that regulates ethics in research. This implies in the case presented, the assent of the child is necessary, especially because a medical procedure (additional bone marrow aspirates) will be performed, and this is related to risks.

Besides this, if the participant is a minor the permission of both parents or the legal is needed as the child might not have the maturity to decide whether to participate in the research study. Thus, the requirements are " Assent of the child and permission of both parents are required".

3 0
3 years ago
What is 72.9 g HCI into moles
meriva
1.9993999057621666 moles
1 mole = 36.46094
6 0
3 years ago
Read 2 more answers
Plz help me with this question plzzzzz​
LekaFEV [45]

Answer:

6

Explanation:

Formula: Al2O3

If we require 2Al2O3

                       We divide 2 by 3

Sorry for the shadow of phone and fingers.

 

8 0
3 years ago
(QUICK) Based on difference in electronegativities between atoms, which is the most polar bond pair? H — S H — Cl H — O H — F
kupik [55]
First, you need to have a periodic table that contains the electronegativities values. once you have them, you just need to subtract the values of the atoms and each bond. I have attached a table with these values. also, it does not matter then order in which you subtract them because they are always positive values. even though you get negative values in your calculator, just make it positive.

H-S----> 2.1 - 2.5= 0.4
H-Cl---> 2.1 -3.0=0.9
H-O---> 2.1- 3.5= 1.4
H-F----> 2.1 - 4.0= 1.9

HF is the most polar because it has the highest electronegativity difference.

4 0
3 years ago
Read 2 more answers
13. Hydrogen and helium have both been used to fill balloons. Which property of helium
Zolol [24]

Answer:

Helium is lighter than Hydrogen and Helium is a much safer gas.

8 0
4 years ago
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