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Luden [163]
3 years ago
5

How are proto-stars formed?

Biology
1 answer:
WITCHER [35]3 years ago
4 0

Answer:

<h3>Inside a nebula, there are areas where gravity causes dust and gas to “clump” together. As these “clumps” gather more and more mass their gravitational pull increases, forcing more atoms together. This process is known as accretion, and the result is a protostar.</h3>
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__________ are secreted by cells infected with viruses, alerting neighboring cells and protecting them from becoming infected.
Juliette [100K]
Histamine is released when a cell come across an antigen

6 0
3 years ago
Which statement is a testable hypothesis? The dog salivating is an example of responding to stimuli. If the dog is given food, t
Leno4ka [110]

Explanation:

The dog salivating is an example of responding to stimuli

7 0
3 years ago
Lu
8090 [49]

Answer:

             D) Vasopressin

Explanation:

                      Neurohormones are defined as those hormones which are reeased from the and secreted in to the blood.

Vassopressin is also a neurohormone released from the hypothalamus and secreted by the neurohyphophysis also called posterior loop of pituitary gland in to the blood and then act on the target organ. Vasopressin is also called anti diuretic hormone its function is to maintain osmolality (the concentration of dissolved particle such as salt in the serum).Its main site of action is kidney to absorb water and not to allow much water to loss trough the urine.Thus it help in maintaining water level and mineral maintenance in the body (homeostasis)

8 0
3 years ago
In humans, Rh+ blood is dominant to Rh–. A man and woman are both Rh+, but their first child is Rh–.
shusha [124]

Answer:

<em> a) There is a 25% chance that their next child will be Rh-.</em>

<em>b) There is a 3/8  chance for a Rh+ girl</em>

Explanation:

As we know from the question that Rh is a dominant gene. A person having only one allele for the gene will show its effect as it is the dominant character.

This means that for a person to lack the Rh factor, it shall not have any allele with the Rh factor.

To illustrate the result, lets draw a punnet square:

            Rh+         Rh-

Rh+    Rh+/Rh+   Rh+/Rh-

Rh-     Rh+/Rh-    Rh-/Rh-

For the probability for it to be a girl, we know that there are 50-50 chances for the next baby to be a boy or a girl. The chance of being Rh+ are 75% for the next baby.

Hence,

3/4 multiplied by 1/2 is 3/8 ,which is the chance for the next baby to be a girl with Rh+ factor.

8 0
3 years ago
The discoloration of the skin and sclera associated with jaundice is caused by excessive ______________ in the blood.
RideAnS [48]

The discoloration of the skin and sclera associated with jaundice is caused by excessive bilirubin in the blood.

<h3>What is bilirubin?</h3>

A reddish-orange substance called bilirubin is produced by vertebrates' typical catabolic process, which breaks down heme. The body needs to go through this catabolism to get rid of waste products that result from the oxidation of old or dysfunctional red blood cells. Elevated levels could be a sign of liver illness or injury. Direct bilirubin levels that are higher than usual in your blood may be a sign that your liver isn't properly removing bilirubin. Increased indirect bilirubin levels could be a sign of other issues. Bilirubin is created in the body as a result of the breakdown of red blood cells (RBCs). The bile duct contains the bilirubin once it has traveled to the liver. Bilirubin is ultimately eliminated by the body through stools. Brown and yellow bilirubin is the pigment that gives feces their brown hue.

To learn more about bilirubin, visit:

brainly.com/question/28287289

#SPJ4

4 0
2 years ago
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