Answer: A). Flatworms
The illustration shows planaria which is a free living organism. It has flat shape and simple structure. This animal belongs to group of Flatworms. The flatworms do not have well developed respiratory and circulatory systems, these are simple organisms which derive the oxygen and nutrients by diffusion.
Answer:
RNA is a single strand so no
Patients with osteoporosis often suffer compression fractures of the vertebral bodies due to loss of bone mass. Osteoporosis is a condition where the bones become weak and at a risk of being fractured. It occurs when the bone mass decreases after mostly 35 years of age. It mostly occurs in women after menopause due to a reduction in estrogen.
Capillaries are one cell thick and so this makes them very thin. capillaries are also arranged in networks known as capillary beds, and thus multiple capillaries are spread over a large area.
