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WARRIOR [948]
3 years ago
6

PLS HELP

Biology
1 answer:
malfutka [58]3 years ago
6 0

Answer:

Explanation:

the two populations will become different species over time due to accumulated mutations occuring in both populations

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A geologist is studying two different rhyolite flows to determine if they were erupted at the same time.
ss7ja [257]
Q1. The answer is 1.

It can be calculated using the equation:

 (1/2)ⁿ = x

x - decimal amount remaining, 

n - a number of half-lives.


x = 50% = 50/100 = 0.5

n = ?

(1/2)ⁿ = 0.5

log((1/2)ⁿ) = log(0.5)

n * log(1/2) = log(0.5)

n * log(0.5) = log(0.5)

n = log(0.5)/log(0.5)

n = 1


Q10. The answer is 2.


It can be calculated using the equation:

 (1/2)ⁿ = x

x - decimal amount remaining, 

n - a number of half-lives.


Rhyolite #2 has 25% of the parent H remaining:

x = 25% = 25/100 = 0.25

n = ?

(1/2)ⁿ = 0.25

log((1/2)ⁿ) = log(0.25)

n * log(1/2) = log(0.25)

n * log(0.5) = log(0.25)

n = log(0.25)/log(0.5)

n = -0.602 / - 0.301

n = 2



Q3. The answer is 100 million years.


A number of half-lives (n) is a quotient of total time elapsed (t) and length of half-life (H):

n = t/H

n = 1

t = ?

H = 100 000 000 years


n = t/H

t = n * H

t = 1 * 100 000 000 years

t = 100 000 000 years<span>

</span>

4 0
3 years ago
Help me please thank you
Marianna [84]

The answer is A or the first one

3 0
3 years ago
Read 2 more answers
How will the filtration rate in the renal corpuscles be affected if a kidney stone creates a blockage of the urinary tract?
Leviafan [203]

Answer:

There will be a progressive fall in glomerular filtration rate.

Explanation:

The glomerular filtration rate,GFR, shows how well the Kidney is functioning or working. When the Kidney is not working well, it doesn't filter the way it should.

Note that, Glomerular filtration is the process of removing wastes and excess fluid to become part of the urine, by the kidney.

7 0
3 years ago
Suppose a segment of mitochondrial DNA (mtDNA) is compared between two similar modern-day species. It is known that this segment
QveST [7]

Answer:

24 million years

Explanation:

A: GCACTAAGCATCGATTT

B: GCACCAGGCACTGGTTC

There are 6 base pair changes between species A and species B. Since we know the rate of change is 1 base pair every 4 million years, we know 6x 4 million is likely how long ago the species diverged. 6x 4 million = 24 million years

7 0
3 years ago
Which of the following describes prophase of mitosis?
tigry1 [53]

Answer:

Daughter chromosomes move toward opposite poles of the cell.

Explanation:

Prophase is the beginning of cell division. At this stage, the CHROMATIN from which the chromosomes are formed thickens and twists spirally and CHROMOSOMES are formed which become visible under a microscope.

CENTRIOLS are organelles whose main role is to form a dividing spindle during cell division, now they separate and move towards the poles of the cell.

When they reach the poles, the threads of the dividing spindle are formed between them. Chromosomes are attached to these threads.

4 0
3 years ago
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