<span>Embryo means "an unborn or unhatched offspring in the process of development, in particular a human offspring during the period from approximately the second to the eighth week after fertilization (after which it is usually termed a fetus)."</span>
Answer:a is the answer Your welcome:)!
Kākahi have a unique life cycle that relies on fish to be successful. Briefly, males release their sperm into the water in spring where it is taken in by the females to fertilise their eggs which are held inside a special brood pouch in the gill.
Answer:D
Explanation: The pulmonary air sacs of birds only permit a unidirectional flow of air through the lungs. Unidirectional flow means that air is inhale and exhale through one trachea alternatively. This means the bird lungs only receive largely fresh air which has a high oxygen content during inhalation and do not receive fresh during exhalation. While air flow bidirectional in mammals.
