1.If you are working as a forensic scientist and are given an unknown powder from a crime scene, what would you hope to find out about the powder?2.You find that the unknown powder contains the illegal drug cocaine. If someone where to ask you to determine the purity of the substance, what would they mean? Why is purity important in crime investigations?

Answers

Answer 1

Answer: not exactly sure, but maybe because the powder might have something important like dna.

Answer 2

Answer:

Answer: #1: If I was a forensic scientist and is given an unknown powder from a crime scene, I would hope to find out if the substance contains drugs or any other component that could be dangerous, and to be treated in a proper way.

2#If some would ask me to determine the purity of an unknown powder that contains illegal drugs like cocaine, they would probably be wanting to remove other substances that are added like baking soda, and the reason this is so important is that sometimes the ingredients they get to mix with have an effect on the test and may miss lid the results.

Explanation:

Related Questions

Different forms of a given gene are known as _____.alleles chromosomes recessives dominants
What does it mean that organisms have a nearly universal genetic code?
What controls population growth?
Which of the following is an example of a convergent plate boundary?a. magma from the asthenosphere moves into the litohsphereb. a volcano erupts on a small island in the pacific oceanc. a valley forms between two seafloor plates as they pull apartd. two continental plates push against each other to form a mountain range
Which two systems participate in removing the carbon dioxide from the body?

Describe how mendel showed that the green-seed trait did not disappear but was only masked. Please help me :)

Answers

Mendel showed that the green-seed trait did not disappear but was only masked by breeding plants with only two alleles for the trait. After the cross of yellow seed, a small amount of offspring had green seeds. So, he concluded that the green-seed trait is masked by the dominant yellow-seed trait and that two alleles are necessary for green-seed trait to show up.

How many circles, each with a 4-inch radius, can be cut from a rectangular sheet ofpaper, measuring 16 inches x 24 inches?
(A) 6
(B) 7
(C) 8
(D) 12
(E) 24

Answers

A)6
the radius is mentioned at four, meaning the length is 8
16/8=2
24/8=3
2*3=6

Let us find the area of circle first

Area of circle = pi x r x r

= 3.14 x 4 x 4
= 50.24

Area of Rectangular sheet = 16 x 24
= 384

Thus, no. of circles = area of recatngle / area of circle

= 384 / 50.24

= 4.64

Thus, the answer is (A) , because it is the nearest.

Gases such as oxygen and carbon dioxide cross the plasma membrane by

Answers

Diffusion - the movement of molecules down a concentration gradient from a region of high concentration to a region of low concentration.
This is because these molecules are non-polar and can easily travel across the hydrophobic parts of the plasma membrane :)

Diffusion is the process by which gases such as oxygen and carbon dioxide cross the plasma membrane.

Further Explanation

Plasma membrane present in all the animals and plant. Plasma membrane in plants is covered by a cell wall. plasma membrane is made up of lipid bilayer which is semipermeable to some molecule ions and gases. Through this lipid bilayer, plasma membrane regulates the influx and efflux of a molecule.

Main functions of plasma membrane is to,

• Maintain the structure of a cell

• Help in interaction with other cells

• Provide protection from outside

• Help in transport nutrient in the cell and transport toxic substances out of the cell.

The lipid bilayer is made up of phospholipids and these are an amphipathic molecule that contains hydrophilic as well as the hydrophobic region. the plasma membrane has 2 bilayers closely packed together and interior of membrane is hydrophobic,altogether these structures make plasma membrane selectively permeable and allow flux of small non-polar material like carbon dioxide, oxygen through simple diffusion.

Diffusion is a movement of a small molecule from higher concentration to a lower concentration. For example, oxygen is used by our cell very easily during metabolism and concentration of oxygen in cell become less and concentration of oxygen is high outside, so oxygen can easily diffuse through bilayer into the cell cytoplasm.

Learn more:

1. Learn more about eukaryotic cell:

brainly.com/question/10767798

2. Learn more about cell membrane: brainly.com/question/5923583

3. Learn more about phospholipid bilayer brainly.com/question/751529

Answer Details:

Grade: High School

Subject: Biology

Chapter: Cell biology

Keywords:

Membrane, cellwall, phospholipid bilayer, cell, oxygen, lipid, diffusion, concentration, lower, high, metabolism, semipermeable, permeability, hydrophobic, hydrophilic, influx, efflux, metabolism.

Which of the following is not part of the nucleotide a. phosphate
b. saturated lipid
c. nitrogenous base
d. deoxyribose sugar

Answers

I think the ANswere is D. Dexyribose Sugar

The answer is B. Saturated lipid. Every nucleotide contains a base, a sugar, and phosphate.

Which includes the physical characteristics of an organism? gene allele genotype phenotype

Answers

The physical characteristics are the attributes that are visible on the outside. They are included in the phenotype of the organism. Thus, option d is correct.

What is phenotype?

A phenotype is an observable characteristic that can be in the form of morphology, structure, appearance, and behavior. The phenotypical traits are defined and caused by the expression of the genotypical traits that are controlled by the inherited genes.

The phenotype includes hair color, eye color, height, weight, blood cells, earlobes, freckles, etc. It differs from a genotype as it is not a genetic code but an expressed or visible characteristic. It is controlled by the expression of genes and environmental factors.

Therefore, option d. the phenotype is the physical characteristics of an organism.

Learn more about phenotype here:

brainly.com/question/26124553

#SPJ5

Answer:

Phenotype i got it right on edge

what is the function of Placenta? During which stage is it completely formed? &How will the fetus body temperature be regulated after birth? During which stage does this method of regulation develop?

Answers

the placenta allows nutrients and oxygen travel from the mother to the fetus(or to the Baby.
The placenta is fully formed by 18 to 20 weeks
These are all I know

Other Questions

In a protein molecule, the number of amino acid molecules may be as few as _____. 5 500 50 5,000

Cellular respiration generates a total of 36-38 ATP molecules. How many of these come solely from glycolysis? 15 ATP molecules 2 ATP molecules 30 ATP molecules

a population of chimpanzees was separated when the forest that they lived in had a section cut down and a town was built. After a long period of time, the chimpanzees came back into contact but were incapable of breeding. Which of the following best describes the process that occurred?

How many chromosomes are in a human skin cell and liver cell.