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Bingel [31]
1 year ago
10

Two of most unique elements on the periodic table are hydrogen and helium. What makes them so unique and removed from the other

groups on the periodic table?
a
Unlike all other elements, hydrogen and helium are gases
b
Unlike all other elements, hydrogen and helium are not considered metals
c
Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons
d
Unlike all other elements, hydrogen and helium have very limited properties
Biology
1 answer:
solong [7]1 year ago
7 0

A. Unlike all other elements, hydrogen and helium are gases

<h3>What is special about hydrogen and helium?</h3>

Hydrogen and helium are the lightest elements in the periodic table having mass number 1 and 2 respectively. They both exist in the form of gases at room temperature. Both Hydrogen and helium are the two most common elements in the universe. Hydrogen make up about 75% of all matter present in the universe. Hydrogen belongs to the metal group but it is not metal but a gas.

So we can conclude that option A is the right answer for the given question.

Learn more about helium here: brainly.com/question/26226232

#SPJ1

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In cats, coat color is an X-linked trait with incomplete dominance. Yellow coat is caused by the allele XT and black coat by the
Goryan [66]

Answer:

The genotype of a black male is XtY

Explanation:

<u>Available data:</u>

  • coat color is an X-linked trait with incomplete dominance.
  • Yellow coat is caused by the allele XT
  • Black coat by the allele Xt.
  • Tortoise coat is caused by the heterozygous condition

So,

<u>females genotypes           females phenotype </u>

  •   XTXT                →        Yellow coat
  •   XtXt                  →         Black coat
  •   XTXt                 →         Tortoise coat

<u>males genotype                    males phenotype</u>

  •   XTY                   →         Yellow coat
  •   XtY                    →         Black coat

Males only carry one X chromosome, so they can only be either black - XtY- or yellow -XTY-.

Females are the only ones that can express the tortoise coat.

4 0
3 years ago
Write an essay how water moves from the soil to leaves of a mesophyte
PilotLPTM [1.2K]

Water moves from the soil to the leaves of mesophytes by osmosis and xylem conduction.

<h3>What are mesophytes?</h3>

Mesophytes are plants that are adapted to moderate water environments only. In other words, they cannot survive extremely or extremely wet environments.

Water moves from the soil to the leaves of mesophytes as follows:

1. Water moves into the root hair by osmosis

2. Water is conducted upward from the root hairs by special cells known as xylems.

3. Conducted water reaches various plant parts, including leaves.

More on mesophytes can be found here: brainly.com/question/1047887

#SPJ1

5 0
2 years ago
What structural changes happen in abnormal prion proteins?
Mila [183]

Answer:

Explanation:

The normal form of the prion protein PrP (shown here) is found on the surface of nerve cells, but when it changes into its misfolded form, it aggregates into long fibrils that clog up the normal functioning of the brain.

6 0
3 years ago
Plz plz plz help
Yuki888 [10]
Asexual reproduction = Binary Fission = Mitosis
The cell at the end of asexual reproduction compare to the original cell: at the end is called daughter cell, at beginning is parent cell; both have same number of chromosomes (2n = diploid).
3 0
3 years ago
Both the brain and the spinal cord are protected by
Veronika [31]
I believe that would be B.
Correct me if wrong.
6 0
2 years ago
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