Answer:
The tail and the caudal fin are the chief locomotory organs of fish and are used for rapid swimming during which tail is lashed from side to side by "alternate contraction and relaxation" of the myomeres on the two sides of the vertebral column.
Explanation:
Answer:
The purpose of mitosis is to make more diploid cells.
Explanation:
Answer: C). 50%
Explanation:
The possible genotypes of the offsprings are Gg and gg. Gg has a dominant gene G for glossy leaves and so will manifest as glossy leaves because G is dominant over g which is recessive. Fifty percent of the offsprings will have glossy leaves while the remaining fifty percent will have nonglossy leaves.
See the attached punnet square for illustration.
Answer:
a. repressor
b. regulator
c. operator
Explanation:
All constituent genes of an operon are transcribed in a coordinated manner, such as polycistronic mRNA, that is, multigenic, which is sequentially translated into proteins by ribosomes. The initiation of transcription can be regulated positively or negatively. The genes under negative control are constantly expressed unless they are "disconnected" by a repressor protein that will prevent gene expression by binding to a specific DNA sequence called operator, preventing RNA polymerase from initiating transcription in the promoter.
Those genes whose expression is under positive control will not be transcribed unless an activating protein is present which binds to a specific DNA sequence and helps RNA polymerase in the initial steps of transcription.
