The right answer is a colored square (or shaded).
Polydactyly is defined as the presence of one or more extra fingers in the hand or one or more toes in the foot.
It is a dominant trait, it means that the heterozygotes will express the trait.
In general, healthy men are represented by white squares, while sick men are represented by colored squares (most often in black).
The stem of a plant grows_________from the pith. <u>outwards</u> or inwards
Answer:
C) They are compressed during inhalation.
Explanation:
Birds breathe through rigid lungs that are located in the animal's thoracic region. The trachea of birds divides into bronchi that branch inside the lungs into very thin tubes called parabronchials or parabroncholes, which are irrigated by blood capillaries that allow gas exchange.
In birds there are no pulmonary alveoli (as in mammals), but air capillaries that depart from the parabroncholes. Oxygen gas passes from these capillaries to the blood capillaries, thus causing gas exchange.
In the lower portion of the bird's trachea, before branching the bronchi, we can find the syringe, a bag-like structure that has vocal cords responsible for the birds' scream and song. Most of the time, the sound emitted by birds serves to attract the mate, mark territory and prevent birds of the same species against some predator or other danger.
