Because DNA is shaped in the form two helix combined thus creating a double helix. RNA is not shaped this way, instead it is shaped as a sort of twisted half ladder compared to DNA’s twisted full ladder shape
The answer is C, because if something contagious we’re to threaten the population of the species then not having any variant means they’re all the same and it would kill them all and cause them to go extinct
Answer:
London smog results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal. This type of smog is aggravated by dampness and a high concentration of delayed particulate matter in the air.
Explanation:
So, the answer would be B or D.
But, it is most likely B due to dampness.
Answer:
When one thing dies, or is taken away from the food web, then this could happen:
Let's say plants are taken away. Then, herbivores have nothing to eat, sot hey die. Then, carnivores have nothing to eat, and the same thing happens, etc.
Plants are the base of survival for every organism in nearly every ecosystem.
Answer:
About four or five days after fertilization, a group of cells forms a ball-like
structure. What is the name of this structure?
After fertilization, a zygote is formed afterwards which carries the genetic materials passed across from both parents
Explanation:
