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ioda
3 years ago
7

Which of the following does not characterize the lungs of birds?

Biology
1 answer:
kompoz [17]3 years ago
8 0

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.

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How can a calendar year help us to understand the magnitude of geologic time
Marina86 [1]

Answer:

The civil year allows us to have an idea of how long our planet has existed.

Explanation:

Calendar year is the 12-month period that corresponds to 365 days of the year, counting from 1 January to 31 December. Geological time, in turn, refers to the didactic organization of the evolution of planet Earth and the forms of life that inhabit or inhabited it. It is an instrument used by Earth's geologists and scientists to analyze and chronologically categorize (through the concept of a civil year) the natural evolution of the world in which we live, in order to better understand its past.

The civil year allows geological time to expose the number of years and days that planet Earth (and its forms of life) are in existence.

7 0
3 years ago
How are virus infections like a “sneak attack”?
Rzqust [24]

Viruses enter human body like an invader and uses the living cells to replicate causing infections in the cell or can damage it.

Explanation:

The attacks of viruses on the body of living organisms is compared with a ‘sneak attack’ as they invade the body and enters into a living cell to replicate themselves. This may cause damage or bring about changes in the cell causing sickness and infections.

They can hide themselves on our body attacking sneakily to harm the immune system to fight the infection. This stealth infection can result in fever, damaging immunity, disorder etc.

6 0
3 years ago
During sporulation, offspring develop from tiny structures called ______.
Karolina [17]

Answer:

Spores.

Explanation:

Sporulation is a type of asexual reproduction which occurs in organisms such as fungi, bacteria. In sporulation, specialized cells transformed into a hard resistant resting structure to overcome unfavourable condition. On the return of favourable conditions spores germinate to form new offspring. Sporulation is very common in fungi.  

3 0
3 years ago
Read 2 more answers
Which of the following us as a direct result of the destruction of habitat associated with the building of transportation facili
svet-max [94.6K]

Answer:

Decreased biodiversity

Explanation:

Highway construction or lessening surface grades for port and airport developments have led to an important loss of fertile land. 

5 0
3 years ago
What structure is made up of microfilaments and microtubules and provide structure to the cell?
son4ous [18]
Microtubules, microfilaments & intermediate filaments. The cytoskeleton is unique to eukaryotic cells. It is a dynamic three-dimensional structure that fills the cytoplasm. This structure acts as both muscle and skeleton, for movement and stability.
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3 years ago
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