The major mechanism driving cellular differentiation is the difference in gene..... A) Expression B) Sequences C) Order D) Replicaiton

Answers

Answer 1

Answer: Expression

Cellular differentiation occurs throughout the cell development of a multi-cellular organism. It occurs when the cell changes from a simply zygote into a complex system of tissues and cell types. Stems cells are cells which have the potential to develop into many different cell types in the body during early life and growth.

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In eukaryotes , DNA is found in the cytoplasm of the cell

Answers

In eukariotes, cells that have a neculeus, the dna is found in the neculeus, not the cytoplasim so that is false... I dunno if that is what u were asking...

A fossil of a fern and other large-leafed plants were found in an area of Alaska. What does this suggest about this area in Alaska?

Answers

The answer is: the area in Alaska once had a warmer climate.

A fern and other large-leafed plants were adapted to live in a warmer climate. The large leaves prove this. It is known that the largest leaves are characteristic of the warmer climate for many reasons, such as increased of transpiration surface, or increased of photosynthetic increase, etc. If fossils of such plants are found in some colder area, such in Alaska, it suggests that this area once was warmer than today.

Answer:

The fossilized fern suggests the area once had a warmer climate. i just got it right.

Explanation:

A student wants to compare how long a flashlight will continue to shine using different brands of batteries. How can the student make sure that the test is fair?

Answers

Answer:

start with unused fresh out of the pack batteries

Answer:

THE TYPE OF FLASHLIGHT USED

Explanation:

Which of the following is found in all viruses?(A) protein coat
(B) cell membrane
(C) membrane-bound organelles
(D) ER
(E) mitochondrial DNA

Answers

(A) Protein coat, is found in all viruses

A solution that contains equal numbers of hydrogen and hydroxyl ions would be called acidic
basic
alkaline
neutral

Answers

a solution that contains equal numbes of hydrogen and hydroxil would be called : NeutralHydrogens component tend to be acidic while Hydroxyl Ion hase a base characteristic.If the amount is equal in a solution, then the PH of that solution will be +/- 7, which is considered a neutral solution

Answer:

The answer is D. neutral.

According to the big bang theory, how did the universe begin? what had to happen before atoms could form?Please help!

Answers

According to the big bang theory, the universe begin to form with the extremely hot and dense climate and cooled to give rise to the atoms and molecules which are the building blocks of living organisms.

What is Big bang theory?

According to the Big Bang theory, the universe was born during a period of inflation which began about 13.8 billion years ago. It was similar to a rapidly expanding balloon which swelled from a size smaller than an electron and changed to nearly the current size within a tiny fractions of a second.

In the Big Bang, initially the universe was extremely hot and dense. As the universe started cooling down, the conditions became favorable to synthesize the building blocks of matter such as the quarks and electrons, which made the living organisms.

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According to the Big Bang Theory, the universe began when an explosion had occurred 15 billlion years ago. It consist of an explosion of space within itself. Unlike an explosion of bomb where fragments are thrown upward in the theory it was an exact opposite. Atoms formed when the matter and anti-matter were formed together after it has cooled down.

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Sickle cell disease is caused by a:A. change in one allele. B. change in the size of a chromosome. C. change in two proteins. D. change in the number of chromosomes in a cell.