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baherus [9]
3 years ago
7

Why can the sphenoid bone be called the keystone of the cranial floor?

Biology
1 answer:
NeTakaya3 years ago
6 0
The sphenoid bone<span> has been </span>called the 'keystone' of the cranial floor<span> because it is in contact with all of the other </span>cranial bones<span>.</span>
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When we have stomach disorder, we take antacid to solve the problem. How does it help? Support your answer with an equation.
juin [17]

Answer:

it reduces ths acid in the body.

Explanation:

when you have stomach problems they usually pres ribe you with an antacid and that reduces the acid that is occurring and helps with the problem.

4 0
3 years ago
In the F2 generation of Mendel’s crosses
irina1246 [14]

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3 0
3 years ago
When oxygen poor blood from the body enters the heart, it enters the?
dybincka [34]
The oxygen-poor blood enters the heart from the body through the SVC, or, the superior vena cava. The oxygen-poor blood then enters the right atrium (RA) of the heart.
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3 years ago
Which of the following statements is FALSE? Which of the following statements is FALSE? Hemoglobin is a tetramer, each of which
Elza [17]

Answer:

The false statement is The iron in both the hemoglobin and myoglobin has two coordination sites that bind to oxygen.

Explanation:

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The tetramers of hemoglobin consists of numerous combinations of seven polypeptide chains and each of which is encoded by separate genes.

Myoglobin is a globular protein that consists of single polypeptide chain of 153 amino acid residue and a single heme group.

Globin of Mb binds with single heme group by forming co ordinate bond.The heterocyclic ring system of heme  is a porphyrin derivative.It is made up of 4 pyrrole ring and 4 pyrroles are linked by methine bridges to form a tetrapyrolle ring.

The Fe atom is present either in Fe²⁺ state or Fe³⁺ oxidation state in the center of protoporphyrin IX ring.The iron atom has 6 co ordination bond,4 in the plane of flat porphyrin ring and two perpendicular to it.

8 0
3 years ago
Three features that arachnids share with other arthropods. <br><br>​
svet-max [94.6K]

Answer:

1. Segmented bodies

2. Jointed appendages

3. Tough exoskeletons

Explanation:

8 0
3 years ago
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