Answer:
matter
Explanation:
"In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings"
Helicase "unzips" the two strands of DNA. During DNA replication.
Answer:
The correct option is option b that is<em> Homo erectus</em> is the common ancestor of<em> Homo neanderthalensis</em> and<em> Homo sapiens.</em>
Explanation:
<em>Homo erectus </em>appears about 2 mya, possibly during the Pleistocene epoch and are considered as direct ancestor of human.They are called as upright man as they use legs for walking without any support.They are thought to be capable of doing certain things like hunting, starting fire,art making, create speech etc.
<em>Homo neanderthal</em> was the most recent ancestor species of modern human as they appear about 40,000 years ago.
They became extinct as they did't fight against environmental hazards and the major cause of their extinction that scientists have claimed that they did't adapt the modern techniques that the modern human does.
The term is ADVERSE DRUG REACTION. Adverse drug reaction refers to an injury that occur as a result of taking a particular medication. It may result from a long time use of a drug or from a single dose. Adverse drug reaction is always negative and may be very dangerous to the well being of the user
