BIOLOGY HIGH SCHOOL

Which element would most likely bond with lithium and form an ionic compound? A. Beryllium
B. Calcium
C. Fluorine
D. Sodium

Answers

Answer 1

Answer:

Answer:

The correct answer is the option C.Fluoride.

Explanation:

Hello!

Let's solve this!

We know that ionic bonding is the type of bond that is made between a nonmetal and a metal. In this type of union one of the elements yields electrons and the other accepts electrons.

As in this case, the metal is Lithium, we need a nonmetal to complete the union.

Let's see the options:

Beryllium is a metal.

Calcium is a metal.

Fluoride is a nonmetal.

Sodium is a metal.

After the analysis we conclude that the correct answer is Fluoride since it is the only one that is a nonmetal.

Answer 2

Answer: Fluorine is most likely to bond with lithium.

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Which of the following is a nucleotide of DNA?a
ribose, phosphate, uracil
b
deoxyribose, phosphate, uracil
c
ribose, phosphate, thymine
d
deoxyribose, phosphate, cytosine

Answers

D.

Hope this helped. :)

Jill stepped on a tack. Which part of the central nervous system caused her foot to move off the tack quickly in a reflex response?

Answers

The danger receptor is called nociceptor; this signals the brain to pull the injured part away from danger. Signal travels to the posterior or dorsal horn of spinal cord.

Answer: spinal cord

Explanation:

A macromolecul that contains carbon,hydrogen,oxygen,nitrogen which is used by the body for growth and repair

Answers

Answer:

Protein.

Explanation:

Biomolecules may be defined as the organic molecules that are present in the living organisms. Four important types of biomolecule are carbohydrates, proteins, lipids and nucleic acids.

Proteins are the polymers of the amino acids. The proteins monomer consists of hydrogen, carbon, oxygen and nitrogen. Proteins are important for the living organisms all enzymes, antibodies and clotting factors are made up of proteins. The proteins are important for the repair and the growth of the body.

Thus, the answer is proteins.

I believe this macromolecule that contains all of the mentioned elements and is used by the body for growth and repair would be proteins. Proteins depending on the specific kind, can play an ample amount of functions within the cell.

What are the three rules that govern the filling of atomic orbitals by electrons

Answers

Rule 1. aufbau rule - energy levels filled so lowest energy level filled first.
Rule 2. pauli exclusion principle - maximum of 2 electrons may be placed in each energy level. Provided the spins of electrons are of opposite sign.
Rule 3. hunds rule - when energy levels are equal one electron is added to each energy level in turn with their spins unpaired until each energy level has one electron.

Factor that controls traits

Answers

Alleles are factors that control traits

Factors that control traits are called alleles

Label each example as either (PI) passive or (AI) active immunity:a. ________ Bill had chicken pox when he was five. He doesn’t catch it again, even when his nephew gets sick with the virus.
b. _______ Billy Jr gets vaccinated with a live attenuated form of the chicken pox virus. He doesn’t get chicken pox after playing with his infected cousin.
c. _______ Bill’s 3 month old daughter is breast feeding. She does not get chicken pox after playing with her infected cousin.

Answers

First, let's distinguish active from passive immunity:
- Active immunity occurs in a direct exposure of individuals to live pathogens. The result is a development of a disease. After that, individuals acquire immunity to the disease.
- Passive immunity is induced by vaccines with antibodies for a disease, so the disease does not develop.

a. ACTIVE IMMUNITY - Bill had a disease, so it must be active immunity.
b. PASSIVE IMMUNITY - Bill got a vaccine and a disease did not develop, so it must be passive immunity.
c. PASSIVE IMMUNITY - Although, 3-month-old daughter did not get a vaccine, she has mother's antibodies from the milk so she will not develop a disease.

Answer:

Active

Passive

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Units of dna that encode for specific characteristics is called