Explanation:
For question no 19
Force (F) = 20N
distance (d) = 5m
Work = F * d
= 20 * 5
= 100 J
Now
For question no 20
D. No matter how much force is applied the object must have motion for work to be done.
Chemicals that help chemical reactions occur at faster rates in living organisms are known as Enzymes.
B it's a vegstigial trait
Many biology texts today still refer to the appendix as a vestigial organ
B. community
hope this helps;)
Answer: C
Explanation: Thymine pairs with Adenine and Cytosine pairs with Guanine.
