What do I already know about chemical and physical properties and changes? Identifying Pure Substances Which of the following is a pure substance? Select all that apply. A. air
B. distilled water
C. iron sulfide
D. oxygen gas
E. seawater
F. sodium chloride​

Answers

Answer 1
Answer:

Answer: db a

Explanation:


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The movement of tectonic plates in two locations is described below:Location A: Tectonic plates move away from each otherLocation B: Tectonic plates collide and one plate moves beneath the otherWhich statement is most likely correct?Magma may rise and form volcanoes in both locations.There is no chance of earthquakes in the two locations.Subduction happens in Location A but not in Location B.Seafloor spreading happens in Location B but not in Location A.
What is the main artery of the heart that carries oxygenated blood to the body

Why is it necessary for each gemete to contain only half as many chromosomes as a body cell

Answers

Answer:

This is for the offspring to show traits that come from both the mother and father.

Explanation:

Gametes are formed by a kind of cell division called meiosis in which the chromosome number is halved. Thus the said gamete cell is said to contain a haploid number of chromosomes.

The fusion of two haploid gametes is called fertilization. It results in the formation of single celled zygote which has a diploid number of chromosomes. The zygote now divides and develops to produce the offsprings whose somatic cells are diploid.

According to the chemical equation, what happens to potassium feldspar during hydrolysis?

Answers

Answer:

When this reaction takes place, water dissolves ions from the mineral and carries them away. These elements have undergone leaching. Through hydrolysis, a mineral such as potassium feldspar is leached of potassium and changed into a clay mineral.

Explanation:

Have this done correctly for brainiest​

Answers

LABELING

From Top to bottom

1) Ocular lens (Eye Piece)

__________________________________________________________

First Row Of the Labeling

2) Arms ( Right Box)

3) Revolving Nose Piece (left Box)

__________________________________________________________

Second Row Of the Labeling

4) Stage Clip (Right Box)

5) Objective Lenses (Left box)

__________________________________________________________

The Knobs in the Right

6) Course Focus Knob (the big Knob)

7) Fine Focus Knob (the small knob)

8) Mechanical Stage adjustment knobs (Small circular knobs in front of the course focus and fine focus knob)

__________________________________________________________

The Left Labeling below the objective lens

9) Stage

10) Condensor Lens

11) lamp or Illuminator

__________________________________________________________

Right Bottom 2 Labeling

12) Brightness adjustment

13) Base

__________________________________________________________

Functions

A) OCULAR LENS

B) MECHANICAL STAGE KNOBS

C) FOCUS KNOBS

D) MECHANICAL STAGE

E) STAGE CLIP

F) CONDENSOR LENS

G) LOW POWER OBJECTIVE LENS

H) BASE AND ARM

I) DIAPHRAGM

J) COARSE FOCUS KNOB

K) ILUMINATOR OR LAMP

L) HIGH POWER OBJECTIVE LENS

Please check Here’s the first one

Which statement is most supportive of the claim that genetic diversity is an advantage of sexual reproduction?

Genetic variation from sexual reproduction ensures that at least some individuals will have advantageous traits that help them survive.

Asexual reproduction results in the same genes being copied, which means the same vulnerabilities in the population.*******

Sexual reproduction creates genetic diversity, which results in a wide range of appearances in a population.




Lack of genetic diversity from asexual reproduction results in a diminished ability to survive changes to the environment.


What is the most likely explanation for a child exhibiting a heritable trait that neither parent exhibits?

The trait was passed on by a different biological parent, and one of the child's parents is not biologically related.

The trait was inherited from a more distant relative, like a great-grandparent.




The parents carried a second trait that masked the trait of interest.

The trait is recessive, so both parents carry it, and the child inherited each recessive allele.**********

Which statement has exceptions?

Sexual reproduction requires two parents, whereas asexual reproduction requires only one parent.

Sexual reproduction produces genetic variation, but asexual reproduction does not.

Sexual reproduction is more complex, while asexual reproduction is a simpler process.

Sexual reproduction involves parental care, while asexual reproduction does not.******

Assume a bacterial cell failed to replicate its DNA before it reproduced two daughter cells. The reproduction would result in

neither cell containing DNA.

both cells containing DNA.

one cell with DNA and one cell without DNA.*******

one cell with DNA and one cell with two sets of DNA.


A parent bacterial cell is able to survive in the presence of the antibiotic penicillin. Subsequent generations from this parent will be _______ penicillin.(1 point)

resistant to*****

killed by

dependent on

vulnerable to

Hydras are animals related to coral and jellyfish. Hydras can reproduce sexually or asexually. Why would hydras avoid reproducing asexually when conditions are difficult?

The lack of genetic diversity could mean that all of the hydras die, depending on the situation. ******

The high genetic diversity could mean that all of the hydras die, depending on the situation.

Reproducing more rapidly would be a good way to take advantage of plentiful resources.

Reproducing more slowly would be a good way to take advantage of plentiful resources.

Answers

Final answer:

Sexual reproduction creates genetic diversity, allowing some individuals to have advantageous traits. Inheriting a trait that neither parent exhibits suggests it is recessive and both parents carry it. Hydras avoid asexual reproduction when conditions are difficult to prevent a lack of genetic diversity.

Explanation:

The statement that is most supportive of the claim that genetic diversity is an advantage of sexual reproduction is: Genetic variation from sexual reproduction ensures that at least some individuals will have advantageous traits that help them survive. Sexual reproduction creates unique combinations of genetic material through the process of fertilization, resulting in offspring with diverse traits. This genetic diversity increases the likelihood of individuals having advantageous traits that can help them adapt and survive in changing environments.

In the case of a child exhibiting a heritable trait that neither parent exhibits, the most likely explanation is that the trait is recessive and both parents carry it. This means that the child inherited two copies of the recessive allele, one from each parent, which is necessary for the trait to be expressed.

Hydras, despite being capable of reproducing asexually, would avoid doing so when conditions are difficult because asexual reproduction does not create genetic diversity. Without genetic diversity, all hydras in the population would have the same traits, making them vulnerable to changes in the environment.

Learn more about Genetic Diversity here:

brainly.com/question/32664545

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UESTION 15 Functions of the stomach include all of the following, except initiation of protein digestion. mechanical breakdown of food. denaturation of proteins. storage of ingested food. absorption of triglycerides.

Answers

The absorption of triglycerides is not a function of stomach. Option D is correct.

The stomach performs various functions in the digestive system which includes,

  • It stores the ingestedfood.
  • It mechanicallybreakdown the food into small particles.
  • Proteins digestion is initiated into the stomach.
  • Stomach denature the proteins into the amino acid strands

The absorption of triglycerides is performed by the small and large intestine after breakdown.

Therefore, the absorption of triglycerides is not a function of stomach.

To know more about absorption of triglycerides,

brainly.com/question/15741252

Answer:

absorption of triglycerides.

Explanation:

The stomach is a digestive organ present in the digestive system which is characterized by the J-shape.

The stomach performs various functions in the digestive system which are very important for digestion of food.

The stomach is involved in churning or breaking down larger pieces into smaller pieces, initiation of protein digestion as it secretes trypsin and chymotrypsin where this enzyme denatures the protein structure present in food and storage of food. But the function of absorption of triglycerides is performed by the small and large intestine which can absorb the triglyceride.

Thus, the selected option is the correct answer.

_______ is a very old drug that's used subcutaneously to prevent DVT in high-risk patients and intravenously to treat DVT and PE. A. Heparin B. Warfarin C. Pradaxa D. Xarelto

Answers

The correct answer is the option (A) heparin.

DVT refers to a condition called the deep vein thrombosis when a blood clot occurs in the deep veins of the legs in the body. PE refers to the Pulmonary embolism when a blood clot is observed in the artery of the lungs.

The drugs used in the treatment of DVT and PE are called the anticogulants which interfere with the process of blood clot formation. Heparin and warfarin are the two older anticoagulants used in the prevention and treatment and prevention of DVT and PE. Heparin is given intravenously to treat DVT and PE whereas, warfarin is taken as a tablet or pill through the mouth. Heparin allows the body's clot lysis mechanism to break down the existing clots and it is also a natural anticoagulant produced by the basophils and the mast cells of the blood.

Thus, heparin is the old drug that is used subcutaneously to prevent DVT in high-risk patients and intravenously to treat DVT and PE.