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2 years ago

Why do birds have hallow bones?

1 answer:

8 0

The hollow part of a bird bone isn't wasted space. In some bones, the hollow cavities contain extensions of the air sacs from the lungs. These air sacs help the bird to get the oxygen it needs to fly quickly and easily.

You might be interested in

________ a superior projection on the ________ bone, attaches to the dura mater and secures the brain within the skull. ________

cluponka [151]

"Crista galli, a superior projection on the ethmoid bone, attaches to the dura mater and secures the brain within the skull."

Crista galli is a vertical projection of the ethmoid bond where the falx cerebri attaches. The falx cerebri is a part of the dura mater that makes the division between the right and left hemispheres holding it into place.

5 0

2 years ago

Read 2 more answers

The scientists who are researching the effectiveness of the HPV vaccine will test their hypothesis by separating 2,392 young wom

Delicious77 [7]

Answer:

Explanation:

The correct answer would be the group that was given a placebo.

A control group in an experimental study is the group that is subjected to all other conditions except the variable whose effects are being determined during the course of the experiment.

Since the main goal of the research is to evaluate the effectiveness of the HPV vaccine, the difference between the experimental and the control group would be the vaccine. Instead, the control group would be given a placebo - a substance that is designed not to have any effect but looks like the vaccine itself.

Correct option: C

6 0

2 years ago

Why do we find tea to be tasteless after we have eaten sweet or candies

cupoosta [38]

Explanation:

The answer is that when you eat the sweet candies and chocolates the buds will remain sweet so that's why the tea become tasteless. The buds only relive the sweetness by staying for few minutes or eat something else.

I hope this answers to your question

7 0

2 years ago

In humans, MN blood types are determined by an autosomal gene with two alleles: LM and LN. In one population of 592 people, ther

RoseWind [281]

Answer:

148

Explanation:

According to Hardy-Weinberg equilibrium,

p + q = 1

p² + 2pq + q² = 1 where,

p = frequency of dominant allele

q = frequency of recessive allele

p² = frequency of homozygous dominant genotype

2pq = frequency of heterozygous genotype

q² = frequency of homozygous recessive genotype

Here,

Total population = 592

Number of NN people = 148

Frequency of N blood group or NN genotype (q²) = 148/592 = 0.25

q = √0.25 = 0.5

p = 1 - q

= 1 - 0.5 = 0.5

Hence, p = 0.5

Frequency of MM genotype = p² = 0.25

Number of people with MM genotype = 0.25*592 = 148

Hence, 148 people will have MM genotype or M blood group.

5 0

2 years ago

A patient is receiving gabapentin (neurontin), an anticonvulsant, but has no history of seizures. the nurse expects that the pat

Diano4ka-milaya [45]

Actually here in this case, the nurse actually expects that the patient may get relieved from any sorts of nerve pain and tingling in any parts of the body, by receiving gabapentin, which is also a anticonvulsant OR antiepileptic drug, hence it can used for treating other nerve problems along with seizures and may also be used at initial stages for prevention of any medical complications.

6 0

3 years ago