1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Paladinen [302]
3 years ago
5

The respiratory systems of birds are very efficient at providing oxygen to the blood, which is necessary for birds to expend the

energy necessary to fly. What feature of the bird respiratory system makes it more efficient than the respiratory systems of other animals?
A. a one-way air flow through the lungs and airways
B. a two-way air flow through the lungs and airways
C. bubble-like alveoli for gas exchange in the lungs
D. many tracheal tubes that connect the lungs to the skin
Biology
1 answer:
Murljashka [212]3 years ago
8 0

Answer:

B

Explanation:

Im sooo sorry if its not :(

You might be interested in
Which are evidence of sea floor spreading ? check all that apply.
Thepotemich [5.8K]

The specific magnetism of basalt rock is determined by the Earth's magnetic field when the magma is cooling. Scientists determined that the same process formed the perfectly symmetrical stripes on both side of a mid-ocean ridge. ... Oceanic crust slowly moves away from mid-ocean ridges and sites of seafloor spreading.

5 0
3 years ago
What living system is being directly<br> affected by the dirty water that this<br> ship is dumping?
Verizon [17]

Answer:

If garbage is dumped into the ocean, the oxygen in the water could be depleted. This results in poor health for marine life due to lack of oxygen. Animals such as seals, dolphins, penguins, sharks, whales, and herring could all die. Bottles and other plastics including bags can suffocate or choke sea creatures.

5 0
2 years ago
Please Help! ASAP It's another Biology question in photo
jenyasd209 [6]
I think the answer to this is E
7 0
3 years ago
Read 2 more answers
Nitric oxide gas dissolves in water and releases hydrogen ions (H+). The solution is now:
Katena32 [7]
The answer is B An acid
3 0
3 years ago
When you place a ball at the top of a hill and it accelerates toward the bottom
Alenkinab [10]

Answer:

When a ball accelerates toward bottom it experiences both rolling friction and air resistance.

Explanation:

  • When the ball rolls from the hill the gravitational force of attraction comes in action and accelerates the ball toward the bottom of the hill.
  • This motion of ball is the rotational motion,  rolling friction acts on it due to rotational motion.
  • As the velocity of the ball increases air resistance also starts to have significant effect on its motion.
  • These two forces try to oppose the motion of the ball.
8 0
3 years ago
Other questions:
  • What is the term for a reproductive cell?
    11·2 answers
  • What is homeostasis in biology
    12·1 answer
  • True/false:Meiosis only occurs in females
    6·2 answers
  • _______ influences include family dynamics, neighborhood quality, and educational opportunities. biological evolutionary environ
    14·1 answer
  • Which of the following is made of cells?
    13·2 answers
  • A newly discovered solar system is found 300 billion kilometers from the sun. How many AU does this represent? Show your work.
    7·1 answer
  • If a God created the Universe, then who created God?
    14·1 answer
  • Attraction of magnets is caused by similar poles aligning .<br> true or false ?
    5·1 answer
  • Which of the following best describes the second law passed under the Morrill Act?
    9·1 answer
  • Cells must move materials through the _______ and throughout the ______ to maintain _______. Movement of substances is regulated
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!