If I know the delta u are talking about , it is a mathematical meaning . Both meaning begin with a D just like the Greek letter , which should help u remember
Answer:
Option B, C, D and E
Explanation:
While conducting research on human being, following conditions must be fulfilled
a) The subject must be made aware of the risk and result of the study
b) Subject must be aware of the study objective, time duration and post study impacts
c) Subject must be compensated for any injury caused during the study
d) Informed consent must be taken from the subject
e) The subject must beware of the possible uncontrollable scenarios. Also the test conducted must be testifiable on human being
f) The ill effects of the study can be anticipated if the result obtained are worthy enough
Considering the above facts, option B , C, D and E are unavoidable
Answer:

point mutation, change within a gene in which one base pair in the DNA sequence is altered. Point mutations are frequently the result of mistakes made during DNA replication, although modification of DNA, such as through exposure to X-rays or to ultraviolet radiation, also can induce point mutations
Explanation:
For solid it could be melting into a liquid
for gas it could be Evaporating into a liquid
Answer:
Explanation: step 1 Carbon enters the atmosphere as carbon dioxide from respiration (breathing) and combustion (burning). The Carbon Cycle Step 2 Carbon dioxide is absorbed.