Answer:
When something goes wrong with the sinoatrial node, you may develop a consistently slow heartbeat (sinus bradycardia) or the normal pacemaker activity may stop entirely (sinus arrest). If sinus arrest occurs, usually another area of the heart takes over pacemaker activity. This area is called an escape pacemaker.
Explanation:
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The system of lenses close to the slide is known as the objective and the one on top of the microscope is known as the eyepiece. Answer is eyepiece.
Answer:
50%
Explanation:
Tt and tt will produce the alleles:
Tt, tt, Tt and tt
T is dominant and is tall
Tt and Tt both have the allele T and are tall but tt and tt are not tall, so 2/4 will be tall
simplifying 2/4=1/2
1/2 × 100 = 50%
I think I know where this question is coming from (c.)
