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Andrej [43]
2 years ago
15

When is it more appropriate to use presumptive tests in a crime investigation?

Biology
1 answer:
Debora [2.8K]2 years ago
8 0
A presumptive Test presumes the pet presence of the question substance it is useful because it tells the drug is used false positive is possible meaning that the test result is positive but the substance is not present.
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Which of the following is NOT a type of angiosperm? dicots tricots monocots none of the above
grandymaker [24]
Tricots are not a type of angiosperm. 
5 0
3 years ago
Read 2 more answers
A scientist samples a population of butterflies and finds that 56% are heterozygous at a particular locus. If the population is
d1i1m1o1n [39]

0.44  the frequency of the homozygous individuals in this population.

What is Hardy-Weinberg principle ?

The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.

From the Hardy Weinberg Law of Population and Genetics,

We have

x²+2xy+y²=1 and

x+y=1

where

x = frequency of the dominant allele in the population

y = frequency of the recessive allele in the population

x2 = percentage of homozygous dominant individuals

y2 = percentage of homozygous recessive individuals

2xy = percentage of heterozygous individuals

Given 2xy = 0.56

from here, y=0.28/x, (the frequency of the recessive allele ) can be obtained

we need to find 'x'

recall, x+y=1, x=1-y

substituting this gives us

y=0.28/(1-y), which becomes,

y(1-y)=0.28

y²- y + 0.28 (quadratic equation)

Solving this to find 'y' gives two imaginary values of y = 0.44 but ,

There is no imaginary solution  .

Learn more about Hardy Weinberg Law of Population

brainly.com/question/14669053

#SPJ4

4 0
2 years ago
All macronutrients, vitamins and minerals provide energy. <br> a. true <br> b. false
erastova [34]

Answer:

True

Explanation:

Macros are macronutrients. Your body needs these nutrients in larger amounts in order to function properly as macro means large. In addition, all of these nutrients provide your body with energy measured in the form of calories or kcals. There are three types of macronutrients: carbohydrates, proteins, and fats.

Hope it helps

bye broskis

8 0
1 year ago
What reasons do scientists give for saying that ciruses are not living organisms?
vaieri [72.5K]
None of the choices are correct
8 0
3 years ago
What must come together in order for atp to be made
kompoz [17]
Cellular respiration is needed for atp to be made. it needs sunlight, glucose and oxygen. i’m pretty sure the main answer would just be glucose and oxygen though.
6 0
2 years ago
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