Define the following:
a) Agents of dispersal
b) Layering
c) Bone marrow
d) Sternum
e) Tendons
Answers
Explanation:
a)There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals.
b)Layering is a means of plant propagation in which a portion of an above-ground stem grows roots while still attached to the parent plant and then detaches as an independent plant.
c)Bone marrow is a semi-solid tissue found within the spongy or cancellous portions of bones. In birds and mammals, bone marrow is the primary site of new blood cell production or haematopoiesis. It is composed of hematopoietic cells, marrow adipose tissue, and supportive stromal cells.
d)The sternum or breastbone is a long flat bone located in the central part of the chest. It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury.
e) Tendons connect bone to muscles.
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