Answer:
Coelom
Explanation:
The extensive body cavity (coelom) is modified to form several specialized regions. Two subdivisions of the coelom are the perivisceral coelom and the water-vascular system.
Answer: B. Heterotroph
Explanation:
The organism is getting nutrients from other living organisms.
The right answer is Transpiration.
In plants, plant transpiration is the continuous process caused by the evaporation of water from the leaves (and the corresponding recovery from the roots in the soil).
For large plants and helophytes, it can be very important. On average, a plant loses the equivalent of its weight in water per day. This explains the role played by large plant formations, including forests on the water cycle and climate.
Answer:
A frameshift changes every codon past it. A base substitution only changes one codon.
Explanation:
DNA is comprised of nucleotides (A, C, T, G) that make up amino acids. Every three bases is called a codon and represents an amino acid.
In a frameshift mutation, a nucleotide is either added or deleted from the sequence. This offsets the entire sequence after it because the reading frame shifts. Here's an example:
ACTGCTATCGTCATC
If another T is added in between the first and second codons, then every codon after will be changed.
ACT>T<GCTATCGTCATC
A substitution mutation is usually less severe, as it only alters one codon in the sequence. These occur when one nucleotide is replaced by another one. Here's an example:
ACTGCTATCGTCATC
Let's say the first G is replaced by a T.
ACT>T<CTATCGTCATC
As you can see, none of the other codons changed.
Typically, a frameshift mutation is considered worse than a substitution mutation.