Answer:
b. Hiccupping is a vestigial reflex that suggests a common ancestry between humans and amphibians.
Explanation:
Hiccupping refers to an involuntary contraction of the diaphragm that usually occurs several times per minute. Some research has suggested that hiccuping is an evolutionary remnant of amphibian respiration. This is because the mechanism is remarkably similar to the way tadpoles gulp air and water across their gills. This would mean that hiccups exist due to an antecedent to modern lung respiration.
If the question is referring to an osmosis experiment, the high test concentration of sugar in at the beginning will be INSIDE the visking tubing.
The answer is splitting of water molecules. This happens during the light stage of photosynthesis where light energy from the sun is absorbed by chlorophyll is used to split water molecules into hydrogen ions and oxygen. This process is called photolysis. The hydrogen ions joins the dark stage or the light independent stage, while oxygen gas is either released to the atmosphere or used for cellular respiration.
Answer: 4 codon
Explanation:
We have two important data, that a molecule brought from Mars uses only three bases (A, C and T) and that it has 30 amino acids
Knowing that to encode 30 amino acids with 3 bases, you need to have 4 bases in your codon.
We have the possibility that having 4 bases can be encoded enough like this:
3 ^ 4 = 81.
however if we do the same procedure with 3 basic codons we will get an insufficient result
3 ^ 3 = 27
so the most likely codon number is 4
In an ecosystem, all the trophic level in a food web are closely interlinked and any change in one level is bound to affect the other levels. The various trophic levels may correspond to producers (such as grass and plants), primary consumers (such as deer), secondary consumers (such as tigers or lions, etc.), etc. If we reduce the land available or necessary for sustaining the ecosystem by half (5 acres instead of 10 acres).
