What's the science behind fingerprint scanners?

Answers

Answer 1

Answer:

Bio-metrics are automated methods of recognizing a person based on a physiological or behavioral characteristic. Among the features measured are face, fingerprints, hand geometry, handwriting, iris, retinal, vein, and voice.

The scanner uses a light-sensitive microchip, either a CCD, charge-coupled device, or a CMOS image sensor, to produce a digital image. The computer analyzes the image automatically, selecting just the fingerprint, and then uses sophisticated pattern-matching software to turn it into a code.

The technique relies on capturing an optical image, essentially a photograph, and using algorithms to detect unique patterns on the surface, such as ridges or unique marks, by analyzing the lightest and darkest areas of the image.

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In this lab, you will explore the microscopic process of building proteins from RNA. Instead of working with variables, you will focus on the steps of that process. What investigative question will you answer by exploring this process?
Organisms that live in desert and desert-scrub biomes have developed unique adaptations that aid in their survival. The Sahara Desert takes up ten percent of the continent of Africa, and is the largest desert in the world. The species that live in the Sahara are highly adapted to survive in the extreme conditions they live in. What morphological and physiological adaptations might be seen in the organisms that live in the Sahara Desert?a. water absorbing skin, large eyes for hunting at night, webbed feet b. light colored fur or feathers for camouflage, dense layer of fat and fur for warmth, hibernation during cold months c. small bodies and long limbs in warm-blooded organisms, light colored fur or feathers to reflect sunlight, lack of sweat glands in many organisms, hibernation during hot months d. dark colored fur or feathers for heat absorption, large bodies and short limbs, consumption of primarily scrub and short grasses
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Muscles make up more than how much of a person's body mass? A. 10%
B. 25%
C. 40%
D. 75%

Answers

muscles make up more then 40% of a persons body mass, so the answer is C.

Answer:

Explanation:

What is life without death?

Answers

Answer:

endless cycle of hell

Explanation:

Answer:

life without death is like not having a life at all. you need to die to have been living.

A researcher proposes a model to explain how enzyme-substrate interactions determine enzyme specificity. The model is based on the idea that substrate molecules form favorable interactions with the amino acid side chains in an enzyme’s active site. Based on the model, which of the following statements best explains an enzyme’s specificity for a particular substrate molecule?a. A hydrophilic molecule interacts with nonpolar side chains in the enzyme’s active site.b. A hydrophobic molecule interacts with polar side chains in the enzyme’s active site.c. A molecule with positive charges interacts with positively charged side chains in the enzyme’s active site.d. A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site.

Answers

Answer:

Option- D

A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site.

Explanation:

A researcher proposes a model to explain how enzyme-substrate interactions determine enzyme specificity. The model is based on the idea that substrate molecules form favorable interactions with the amino acid side chains in an enzyme’s active site.Based on the model, the following statements best explains an enzyme’s specificity for a particular substrate molecule, which is "A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site."

Answer:

D. A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site.

Explanation:

Because opposite charges attract, a molecule with negative charges will form favorable interactions with positively charged side chains in an enzyme’s active site. Based on the model, the favorable interactions helps explain the enzyme’s specificity for the molecule as a substrate.

I also got this question correct so I am sure.

Community interactions includea. predation.
b. competition.
c. symbiosis.
d. all of the above.

Answers

The answer to your question is d. All of the above

In cells, __________ are proteins that are needed to lower the amount of energy required to start chemical reactions.a. acids
b. enzymes
c. products
d. substrates

Answers

Answer:

b. enzymes

Explanation:

For any reaction to happen, an energy barrier must be crossed first. This is called as activation energy. Enzymes are biological catalysts that lower the activation energy for a reaction. As a result the reaction is started sooner and its rate is fast.

The substrate binds to the active site of enzyme to form a substrate-enzyme complex. The reaction takes place and product is formed also releasing the enzyme back so that it can be used again.

The answers would be B.
Enzymes accelerate or catalyze ( slow or stop) chemical reactions. And enzymes are protein molecules.
While A, C, and D are not.

Mammals with a carnivorous diet include thea. rabbit, mouse, elephant, zebra, and monkey.
b. bear, badger, fox, human, and rat.
c. aardvark, whale, hyena, dog, dolphin, and mole.
d. giraffe, deer, elk, walrus, human, and rat

Answers

I want to say C. Aardvark, whale, hyena, dog, dolphin, and mole.
All of these mammals eat primarily meat.

B. is a close second, but the human and rat are both omnivores and don't regularly rely on meat for most of their dietary needs.

Answer:

ITS AAAA

Explanation:

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