Question

c
.
Where are the blood cells produced?
D.
How is the movement of earthworm different from that a snail?
E.
How is cartilage different from a bone?​

Answer 1

Answer:

1) Red blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow called hemocytoblasts give rise to all of the formed elements in blood.

2)A snail moves with the help of a muscular foot. An earthworm moves by contraction and relaxation of its muscles. During movement, the earthworm first extends the front part of the body, keeping the rear portion fixed to the ground.

3)The main difference between bone and cartilage are listed below. Bones are the hard, inelastic and a tough organ that forms part of the vertebral skeleton. Cartilage is a soft, elastic and flexible connective tissue that protects the bone from rubbing against each other. Bones are of two types: compact or spongy

Explanation:

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Answer 2

C. Blood cells bare produced in the red boke marrow of long bones .

D. Earthworm has tiny little hair like locomotory structures called setae , tiny legs which help it to move forward

Whereas snails on the oher hand (or should I say foot) secrete mucus from the base of their muscular foot and use that to move their whole body by reducing friction

E. Both bone and cartilage are dense regular connective tissue , the differences mainly occur in their origin and location , and also bones are much stronger than cartilage , also bones are slightly flexible , but cartilages are not .