Answer:
A food web is a detailed description of the species within a community and their relationships with each other; it shows how energy is transferred up food chains that are interlinked with other food chains.
Answer:
I think it is D
Explanation:
A- That is a random gene mutation and is not natural selection
B- A lizard sitting under the shade isn't selecting anything
C- that would be sexual selection
D- bacteria becomes resistant because of natural selection.
Hope this helps :)
Answer:
DNA is the genetic material of all the living organism except some viruses. The structure of DNA consists of nitrogenous base, pentose sugar and the phosphate group.
Tube 1 - The nucleotide are linked together by phosphodiester bond. As these bonds are broken, the structure of DNA contains the individual complementary nucleotide are linked together by hydrogen bonds.
Tube 2 - The bond between the sugar and the bases are broken. The DNA structure consists of the phosphate group chain only with any pairing with the base.
Tube 3 - The DNA nitrogenous bases are adenine, guanine, thymine and cytosine that are linked together by hydrogen bonds. The agents break the hydrogen bonds. Now, the DNA structure consists of the single strand only.
Answer: Option D is the correct answer.
Explanation:
Animals are not the first to colonize land. Prokaryote are probable the first organisms to colonize land. They have been existing about 2.6 billions years ago. Fungi have been in existence long time ago. Study reveals that they have been living in aquatic habitat before coming to colonize the land.
