Down;s syndrome is also known as trisomy 21 because it is caused by an additional copy of chromosome 21. The correct answer is the third one: 21st.
Explanation:
Cephalopods are organisms tha belong to the class Cephalopoda, which is composed by squids, octopus and nautilus.
The options we have are squids, jellyfish and cuttlefish. The two last ones do not belong to the Cephalopoda class, and also do not have the characteristics to be considered one.
Answer:
A.
Hope it helped,
BioTeacher101
It is C or A,because i did this in school and it was a chemical reaction.
Answer: It is most related to a <em>spotted chorus frog</em>
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<em>I hope this helps, and Happy Holidays! :)</em>
Just So you know, <span>The molecular clock, explains Blair Hedges, is a tool used to calculate the timing of evolutionary events. Instead of measuring seconds, minutes and hours, the molecular clock measures the number of changes.</span>
