The correct answer is segmentation. <span>The annelids also known as segmented worms, are bilaterally symmetrical invertebrate organisms. Their main characteristic is a segmented body. Annelid's body consists of segments that are identical (except the first and the last one), having the same sets of internal organs and external chaetae. Septa separate the segments and enable the annelids to change the shapes of individual segments, which facilitates movement by peristalsis (symmetrical contraction movement).</span>
The plane that divides the body into left and right portions
is known as the sagittal plane also known as the median plane. Sagittal plane
bisects the body into two halves and the plane motion occurs around a coronal
axis. Movements in the sagittal plane are the flexion and the extension. The Flexion
movement involves the bending movement in which the relative angle between two
adjacent segments decreases. The Extension movement involves a straightening
movement in which the relative angle between the two adjacent segments
increases. In general, both flexion and extension movement occur in many joints
in the body, which include shoulder, wrist, vertebral, elbow, knee, foot, hand
and hip.
The sagittal plane has two subsections; they are the
Midsagittal and the Parasagittal. The midsagittal runs through the median plane
and divides along the line of symmetry while the parasagittal plane is parallel
to the mid-line and divides the body into two unequal halves.
Answer:
Option (A).
Explanation:
Epigenetics may be defined as the study of the heritable phenotype changes that do not change the sequence of DNA. The gene activity or gene expression changes in epigenetics. Environment may also brings the changes in gene expression.
The change in phenotype of the individual must be inherited in epigenetic changes. The chromatin must be modified but the nucleotide sequence remains unaltered in epigenetic changes.
Thus, the correct answer is option (A).
Answer: Hypothalamus
Explanation:
they are oxytocin and antidiuretic hormone(ADH)
