do the results shown in figure 19.5 prove conclusively that histone modifications are causing reduced hnf4a gene transcription? why or why not?

Answers

Answer 1

Answer: because of the null hypthesis

Related Questions

Which is the main reason toads must lay eggs in water?A. The eggs do not have a shell to prevent water loss. B. The eggs need to absorb nutrients from water. C. The eggs are not laid in nests. D. The eggs need protection from predators.
The energy needed to get a reaction started is known as ________________________. activation energy cell energy chemical energy all of the above
In binary fission, are the reproduced cells genetically the same or different from each other?
Nick hypothesizes that wax has a higher melting point than chocolate. How can Nick test his hypothesis?A. Measure the volume and weight of samples of wax and chocolate and calculate their densities. B. Heat equal masses of wax and chocolate and measure their temperatures when they start to melt. C. Heat samples of wax and chocolate and use a stopwatch to time how long it takes until they start to melt. D. Use Mohs Hardness Scale to test how easily wax and chocolate can be scratched.
The process helps fuel your metabolism with oxygen. Select all that apply. Primary decomposers are _____. fungi plants trees bacteria animals

1. Scientific theory
What is the definition of this answer ?

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Answer:

scientific theory: an explanation of an aspect of the natural world that can be repeatedly tested and proved to be a success every time.

The chlorophyll of the green algae is in chloroplasts.
true or false

Answers

Answer: True

Explanation:

The chlorophyll of all the green organisms lies in the chloroplast. It is a green colored pigment which helps in trapping the sunlight from the sun.

The trapped sunlight is used as a source of energy in order to convert this energy into chemical energy.

Carbon dioxide and water is added for the formation of carbohydrates in the plants.

Im pretty sure the answer is true

Sweating and panting are examples of which characteristic of life?a. responding to the environment
b. using energy
c. reproducing
d. growing and developing

Answers

The correct answer is option a. responding to the environment.

The sweating is the release of sweat from the sweat glands. The sweating releases the water molecules on the skin surface as a result of increased body temperature due to changes in atmospheric temperature. The water molecule from the skin evaporates causing a decrease in body temperature.

The panting increase in the heat loss by respiration, hence, it is also a respond to the increased atmospheric temperature. So, both the conditions are associated with the temperature increase outside the body, here change in temperature act as stimuli and body react according to change.

A: responding to the environment

How are cis-trans isomers used for night vision?

Answers

Answer: 11-cis Retinal is the light-sensitive component of rod and cone photoreceptors, and this structural conformation in rod photoreceptors is vital for low-light vision (night vision)

Explanation: To detect light, photoreceptors (especially rods) employ the exceptional properties of 11-cis retinal. Rods transmits low-light vision, as only them have enough sensitivity to respond and to trigger vision .

11-cis retinal in rods are bound to an opsin signaling protein to form a visual pigment molecule. Its other isomer, the all trans retinal is isomerized to 11-cis retinal causing the branching of the polyene chain, deactivating opsin molecule and increasing sensitivity to light. This adaptation occurs rapidly in minutes in the dark, resulting in maximum sensitivity to light.

"Cis-Trans Isomerism in Vision
The retina, the light-detector layer in the back of our eyes, contains colored compounds called visual pigments. They are insoluble in water and can be extracted from the retina with aqueous detergents. In the dark these pigments are reddish (their name, rhodopsin, comes from a Greek word meaning rose-colored), but the color fades upon exposure to light.

Rhodopsin molecules contain a protein called opsin plus a derivative of vitamin A called 11-cis-retinal. In the dark, 11-cis-retinal fits nicely into the folds of the surrounding opsin. When light hits the rhodopsin, the 11-cis-retinal becomes all-trans-retinal and no longer fits into the cavity of opsin. The opsin and the all-trans-retinal separate. The change in rhodopsin conformation is eventually transmitted to the nerve cells in the eye and then the brain. The stereoisomerism of retinal is thus an important part of the vision process. Note that only one of the five double bonds is affected in this transformation, but when this one changes from cis to trans, the shape of the entire molecule changes. An enzyme later catalyzes the change of all-trans-retinal back to 11-cis-retinal so that it can once again bind opsin and wait for the next exposure to light.

The retinas of vertebrates have two kinds of cells that contain rhodopsin. These cells are distinguished by their shapes: rods and cones. The cones, which function in bright light and are used in color vision, are concentrated in the central portion of the retina, called the macula, and are responsible for the greatest visual acuity. The remaining area of the retina consists mostly of rods, which are used for peripheral and night vision. 11-cis-retinal is present in both rods and cones. However, the opsin is somewhat different in the two kinds of cells, and the cones have three different opsins, one kind each for perception of blue, green, and red colors."

How can a person donate blood and never run out of it?A. Blood components are continuously pumped by the heart.
B. Blood components are continuously circulated through the blood vessels.
C. Blood components are continuously produced in the bone marrow.
D. Blood components are continuously digested by enzymes.

Answers

Answer: The correct answer is- C. Blood components are continuously produced in the bone marrow.

Formation of blood cells is a continuous process that occurs in the bone marrow ( a gelatinous, soft tissue present within bones) of adults.

This process is called as hematopoiesis, in which undifferentiated precursor cells ( also called stem cells) are developed and differentiated into particular blood cell type ( having specific function).

Thus, through this continuous process, all the components of blood can be replenished whenever they are required.

Therefore, when a person donates blood, he never run out of it.

blood components are continuously produced in the bone marrow

which of these body systems is involved in coordinating and controlling body movements and responses?

Answers

Nervous system is the part of animals body that coordinates its voluntary and involuntary action and transmits signals to and from different parts of its body

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Which is the source of energy for earths living things?

Commercial plant growers artificially control the lengths of days and nights. This produces a response calledA. photoperiodism. B. gravitropism. C. thigmotropism. D. phototropism.