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Nastasia [14]
3 years ago
7

Pls help :( me i rly need help

Biology
2 answers:
makvit [3.9K]3 years ago
8 0
The first one is disrupted selection
3241004551 [841]3 years ago
3 0
C. directional selection
True 

Sorry, I don't know the second one. 
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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
What types of plants are better adapted to drier climate
Svet_ta [14]
Cacti and other succulents can adapt to dry climates. They are able to store water in their leaves, while others store water in the roots or trunks. The waxy cuticle helps prevent water loss.
4 0
3 years ago
Environmental influences begin at birth and continue throughout life. please select the best answer from the choices provided t
katrin2010 [14]

The statement environmental influences begin at birth and continue throughout life is definitely False.  

<h3>What do you mean by Environment?</h3>

Anything which is present in the surrounding of an organism is called its environment. The environment is surrounded by abiotic and biotic factors.

Environmental influences will not remain the same throughout life. If a human is affected by a natural disease, it will definitely be cured with medications. Environmental influences sometimes behave as genetic diseases, which stay long or sometimes endless.

Therefore, the statement environmental influences begin at birth and continue throughout life is definitely False.

To learn more about Environmental influences, refer to the link;

brainly.com/question/503225

7 0
2 years ago
List the four parameters of water quality measured.<br><br> Can someone tell me what this means..?
elena55 [62]

Answer:

Each station that measures the water quality characteristics....

Explanation:

like temperature and water level maybe....

5 0
3 years ago
Describe the action of neurotransmitters at a synapse.
OlgaM077 [116]

Answer:

Synapse, more like MY ALLergies

Explanation:

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