False..... pollination occurs at stigma not ovary !!!
Answer:
<em>The correct option is D) The four nitrogen bases of DNA combine is threes to produce only 20 amino acids.</em>
Explanation:
Our DNA is made up of four nucleotide bases. The genetic codon can produce 20 different amino acids based on the sequence. The genetic code which codes for a certain amino acid remains the same for all types of organisms whether be prokaryotes, animals or plants. Hence, the genetic code is considered universal as the four nitrogen bases combine to form only the 20 different amino acids in all types of organisms alive.
Answer:
b Freezing temperatures change the quantity of ocean water, and rock made of larger grains forms the top layer.
Explanation:
Review the diagram, which shows a sedimentary sequence.
What could cause a sea-level change that would result in this sedimentary sequence?
a Melting ice caps change the quantity of ocean water, and rock made of calcium carbonate forms the top layer.
b Freezing temperatures change the quantity of ocean water, and rock made of larger grains forms the top layer.
c Rising temperatures change the density of ocean water, and rock formed in still waters appears in the upper layer.
d Tectonic activity changes the shape of the ocean basin, and rock formed in the deep sea appears in the upper layer.
