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
Poison ivy is a weed that produces an oil which causes skin rashes. Scientists want to perform an experiment to see if poison iv
attashe74 [19]

Answer:

In these experiments the control group is compared with the comparison group.

The control group will sometime be in the presence of carbon dioxide, and will be controlled, where the analyst or researcher will take an expert position and then will compare it evolutionarily with the comparison group that the ideal would be that there is not ever a carbon dioxide

Explanation:

If we have two poison ivy research groups that are representative of the poison ivy that the researchers are looking to investigate the results will have much better credibility and will be more reliable.

On the other hand, the comparison of the two groups makes it possible to rigorously analyze whether or not poison ivy grows in the presence of this gas.

6 0
3 years ago
An action potential in one segment of axon causes adjacent sections of axon membrane to reach threshold through what mechanism?
Furkat [3]
<h3>Answer:</h3>

The generation of local currents.

<h3>Explanation:</h3>

An action potential at the axon hillock generates local currents that depolarize nearby sections of axon to threshold. This change in membrane potential causes voltage-gated Na+ channels to open in the adjacent axon segment. This generates/regenerates the action potential in the adjacent segment, causing the action potential to propagate away from the axon hillock.

5 0
3 years ago
Thomas's biological mother and father are both gifted athletes. He was adopted by a couple who had no interest in him being invo
guajiro [1.7K]

Answer:phenotype

Explanation:

Phenotype is a physical appearance or biochemical characteristics which is influenced both by its genotypes and the environment. In other words,its a particular trait that is expressed, e.g. height,color,behaviour etc.

In the above mentioned case,Thomas inherited his parents's genotype(atheletic),but it was not expressed because of his adoptive parents' disinterest in sports.

7 0
3 years ago
We can control malaria by controlling mosquito
Sveta_85 [38]
Mosquito coil.or some chemical pest spread
7 0
3 years ago
Read 2 more answers
Plz help being timed will give brainlest
nasty-shy [4]

2.5g/ml will sink because it has higher density compared to water

0.5g/ml will float because it has lower density compared to water

5 0
3 years ago
Other questions:
  • Competition among individuals in population is most likely to occur when:
    6·1 answer
  • A single strand of DNA helix consists of 100 nitrogenous base pairs. On one strand, 36 of the bases are adenine and 24 are cytos
    9·1 answer
  • Select the most appropriate statement with respect to cellular respiration in humans.
    9·1 answer
  • When a car is parked in hot sunlight, the temperature of the car’s seats and the thermal energy of the seats .
    9·2 answers
  • Which of the following is an ABIOTIC factor?
    8·2 answers
  • After completing 10 years of experimentation, a scientist reports a
    15·1 answer
  • which phrase best summarizes the theory of evolution by natural selection? a. parent organisms pass on traits they have acquired
    6·2 answers
  • How to calculate average molarity<br>​
    7·1 answer
  • Drinking non-potable water can cause
    11·1 answer
  • In an individual heterozygous for a single trait, the probability of the recessive allele being present in a gamete is ______. M
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!