Sponges are.... well.... just...... absorbent.
The Major function of the respiratory system is to exchange oxygen and carbon dioxide. Inhaled oxygen enters the lungs and reaches the alveoli, the layers of the cells lining the alveoli and the surrounding capillaries are each only one cell thick and are in very close contact with each other, the barrier between air and blood averages about 1 micron in thickness. Oxygen diffuses quickly through the air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled.
Answer:
In the animals control and co-ordination is done by the nervous system and endocrine system whereas in animals nervous system is adequately developed and consists of brain, spinal cord and nerves; in animals hormones are secreted by endocrine glands.
Explanation:
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➷ 1) Respiration
Protein synthesis
2) Cytoplasm
3) A dominant trait only requires one allele for it to produce a dominant phenotype. However, a recessive trait requires two alleles (one from each parent) to produce a recessive phenotype.
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