Answer:
b. forward mutation, suppressor mutation
Explanation:
When the nucleotide sequence of an organism is altered, it is called as mutation. It can be caused by DNA damage or replication errors. In forward mutation, the wild type allele is converted to a mutant version such that the gene product is non functional or its not produced at all. Suppressor mutation is the second mutation which reverses the phenotypic effects of the previous mutation. This process is called as synthetic rescue.
Since here gene X was converted into a mutant form by the mutation, it had undergone forward mutation. When gene Y was mutated, the function of gene X was restored which ultimately also restored the phenotype hence it is an example of suppressor mutation.
Answer:
This allows the frog to push or pull its tongue. Also there will be two openings in the back of the mouth. A long horizontal slit which is the opening to the esophagus. A second smaller slit appears below the esophagus opening, which is the glottis, the opening to the frog's respiratory system.
Explanation:
<u>Answer</u>:
16 - light
17 - 
18 - 
19 - 
20 - sugar
The image describes the process of photosynthesis and the production of sugar through the Calvin cycle. Light is the energy source that drives this process through which, together with water molecules, chemical energy known as ATP is produced. This and NADPH, which is also produced during photosynthesis, are used to drive the Calvi Cycle. Here, by using atmospheric , sugars are produced. These are vital to the survival and growth of the plant. Oxygen is also released into the atmosphere as a result of photosynthesis.
They decrease because the zebra mussel were taking their resources. Leaving them nothing to eat.
