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professor190 [17]
3 years ago
9

In humans, the pelvis and femur bone, are involved in walking. In whales, the pelvis and femur bones would be an example of?

Biology
2 answers:
Sedaia [141]3 years ago
6 0
C. Vestigial structures :)
Butoxors [25]3 years ago
4 0

C. Vestigial structures

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Why body system is dependent on a constant supply of iron, and what deficiency is caused when this mineral is lacking?
KATRIN_1 [288]
The respiratory system always needs iron. The red blood cells are in charge of the transport of O2. They need iron to do this. 

Hope this helps! :)
7 0
2 years ago
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A white dog is crossed with a heterozygous black dog. What are the pearents genotype ? And what percentage of the offspring will
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3 years ago
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The rate at which the concentration of a drug in the bloodstream decreases is proportional to the concentration at any time t. I
Westkost [7]

Answer:

C(t) = C_oe^{-kt}

Explanation:

From the given information:

At any given time (t), let c(t) represent the concentration of the drug present in bloodstream.

Deriving the equation:

\dfrac{dC}{dt} decrease proportionally to Concentration C

i.e

\dfrac{dc}{dt} \alpha - C

\dfrac{dc}{dt} = -k C

\dfrac{dc}{c} = -k dt

\int \dfrac{dc}{c} = -k \int dt

㏑(C) = -kt + λ

where,

λ is the integration constant.

Integrating at t = 0, concentration of blood = Co g/mL

C(0) = Co

㏑(C₀) = 0 + λ

λ = ㏑(C₀)

From ㏑(C) = -kt + λ

㏑(C) = -kt + ㏑C₀

㏑(C)  - ㏑C₀ =  -kt

\dfrac{C}{C_o} = e^{-kt}

C(t) = C_oe^{-kt}

∴

The concentration of drug in blood at any time t is:

C(t) = C_oe^{-kt}

4 0
2 years ago
Answer quick!! <br> Short answer please
tino4ka555 [31]

Answer:basicallly what a hypothesis is something you belive in and your trying to prove it. It deifines the relationship between two varaiables.

Explanation:

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What percent of species become extinct when mass extinction occurs?
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Scientists estimate that at least 99.9 percent of all species of plants and animals that ever lived are now extinct.

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