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3 years ago

Write a summary paragraph to explain what is known about the origin of life on Earth.

1 answer:

6 0

There are at least three types of hypotheses which attempt to explain the origin of life on Earth. The first and oldest of these hypotheses suggest that life was created by a supreme being or spiritual force. Most cultures and religions have their own explanations of creation that are passed down from generation to generation. Because these ideas cannot be proved nor disproved, we consider them outside the boundaries of science. For that reason, they will not be pursued here and are left to each individual to decide.

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How can changes in a populations gene pool occur

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A gene pool changes throughout evolution this could be natural selection, genetic drift or a mutation. A gene pool does this to adapt with the needs of the environment it is in

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4 years ago

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Lizard is a poikilothermic animal why

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Lizard is a poikilothermic animal because lizards are those animals that do not require a fixed body temperature, their temperatures can fluctuate with little to no adverse effects to their overall health. 

Explanation:

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3 years ago

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4 years ago

Suppose a population grows according to a logistic model with initial population 500 and carrying capacity 5,000. If the populat

Gre4nikov [31]

Answer:

4,500

Explanation:

The logistic growth model is given by:

$\frac{dP}{dt}=rP(1-\frac{P}{K} )$

Solving for P(t), we obtain:

$P(t)=\dfrac{KP_0e^{rt}}{(K-P_0)+P_0e^{rt}}$ where:\\P_0=$Initial Population\\K=Carrying Capacity\\r=Growth rate\\P(t)=Population at a time t.$

We are given that:

$I$nitial Population,P_0=500\\$Carrying Capacity,K=5000\\Population after one year, P(1)=1250 \implies t=1$

Therefore:

$1250=\dfrac{500 \times 5000e^{r \times 1}}{(5000-500)+500e^{r\times 1}}\\\\1250[(5000-500)+500e^{r}]=500 \times 5000e^{r}\\4500+500e^{r}=2000e^{r}\\2000e^{r}-500e^{r}=4500\\1500e^{r}=4500\\e^r=3\\$Take the natural logarithm of both sides\\r =\ln 3$

We want to determine the population after another three years. i,e When t=4

$P(4)=\dfrac{500 \times 5000e^{\ln|3| \times 4}}{(5000-500)+500e^{\ln|3| \times 4}}\\=\dfrac{2,500,000e^{\ln|3| \times 4}}{4500+500e^{\ln|3| \times 4}}\\P(4)=4500$

Therefore, after another three years, the population will be 4500.

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3 years ago