A book rests motionless on a table. What force arrow is missing from this free body diagram?

Virtually all cells in the human body have the same DNA. What’s make some undifferentiated cells differentiated into brain cells

mariarad [96]

Answer:

Changes in gene expression

Explanation:

This phenomenon is the result of changes in gene expression. That means, how the information in the DNA is used by the cell. The genes that are active in the cells of the brain will be very different from the genes that are active in the cells of the bone marrow.

These patterns of gene expression are different for each cell, and dictate the identity of that cell. Gene expression patterns are controlled by a variety of factors in the cell that allow tissue-specific expression, such a transcription factors.

This can also be facilitated by another layer of regulation called epigenetics, which literally means "on top of" genetics, and refers to modifications of DNA (and the proteins around it), that can reflect and influence the activity of the genes within.

8 0

3 years ago

What is Chlamydomonas?

saveliy_v [14]

Chlamydomonas is a unicellular algae. It occurs in many Varieties .Most of these are free floating,fresh water green algae.

<h2>More information</h2>

the plant body is unicellular and biflagellate.
the cell is spherical or cylindrical in shape .
the Protoplasm of the cell is always surrounded by a thin cellulose wall .
a pair of flagella of equal size is present at the anterior end. it moves by the lashing actions of the flagella.
usually two contractile vacuoles are present .
it contains a single nuclear suspended in colourless portion of the cytoplasm .

8 0

2 years ago

Which of these actions is a reproductive strategy?

Sergeu [11.5K]

The answer is a lioness teaching her young how to hunt
An action could be considered as a reproductive strategy is it's being done to ensure the continuation of the next generation.
Teaching the young lion to hunt will definitely improve the young lion capability's to survive and help their survivability

4 0

3 years ago

Read 2 more answers

Susan, a 67 year old female, is experiencing ataxia, or poor muscle coordination. when doctors perform a romberg test, the resul

Mice21 [21]

Correct Completed Questions; Susan, a 67 year old female is experiencing ataxia, or poor muscle coordination. Doctors perform a neurological exam and they find that Susan is not positive for the Romberg test. Describe what these findings suggest about the sources of Susan's ataxia.

Answer:s

In order to test for balance and positioning(proprioception) as a measure of neurological function, or to test level of intoxication alcohol during driving, Romberg test is usually conducted,which can be negative or positive.It is generally used to investigate the cause of loss of motor control in individuals.

Explanation:

A positive result showed that her ataxia was due to loss of positioning due to loss of sensory from sensory neurons.However if negative as in the case of Susan, then it is to due to abnormality/dysfunctions in the cerebellum, and not due to loss of sensory functions,

3 0

2 years ago

What element makes up most of the earth's core?

Alinara [238K]

Solid inner core, hope this helps, 4300*C.

6 0

3 years ago