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BlackZzzverrR [31]
3 years ago
10

Which sequence of events BEST describes secondary succession?

Biology
1 answer:
gtnhenbr [62]3 years ago
7 0
Lichens shrubs small trees forest
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What was tha accomplishment of Wendell of Stanley
vaieri [72.5K]

Answer: he crystallized tobacco mosaic virus ( TMV)

Explanation

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A dna molecule containing 32% thymine would contain how much cytosine?
anygoal [31]
18% because C pairs with G. A pairs with T. T and C are not complementary base pairs, but we do know that if a molecule consists of 32% T, it must have 32% A as well.

32 + 32 = 64

100 - 64 = 36

36 ÷ 2 = 18

There must be 18% of C.
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3 years ago
Explain the role that the skeletal system plays in facilitating cardiovascular system function
Arturiano [62]

Answer:

Skeletal system provide strength and protection to heart and also produces essential blood cells such as RBC and WBC

Explanation:

All organ systems in our body work in co-ordination with each other. Skeletal system comprised of bones and cartilages while cardiovascular system comprises of hearts, blood and blood vessels. Firstly the skeletal system protects the heart and also assists in its pumping along with muscle. Secondly, the blood cells such as RBC and WBC are circulated by the blood throughout the body. However these cells are produced in the bone marrow (inside the bones)  

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3 years ago
PLEASE HELP ME!!!!<br> IT IS FOR BIOLOGY!!!
g100num [7]

Answer:

C.

Explanation:

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3 years ago
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Calculate the mass defect for oxygen-16 given this data. Round to the 5es001-1.jpg decimal place. mass of an oxygen-16 atom: 15.
Naya [18.7K]

Answer:

Explanation:

Given parameters:

Mass of oxygen atom = 15.994914amu

Mass of a proton = 1.00728amu

Mass of a neutron = 1.00866amu

Unknown:

Mass defect = ?

From the periodic table, the number of the elementary particles in a neutral Oxygen atom is given below:

           Number of protons = 8

           Number of neutrons = 8

          Number of electrons = 8

Solution

The mass defect examines the difference between the actual mass of an atom and sum of masses of the nucleons.

The mass of an atom is concentrated in the nucleus which contains protons and neutrons. Electrons have little to no weight compared with the nucleons.

    To calculate the mass defect, we first know the mass of the nucleons first:

           1 proton has a mass of  1.00728amu

           8 protons will weigh: (8 x 1.00728)amu = 8.05824amu

For the neutrons:

          1 neutron has a mass of 1.00866amu

          8 neutrons will weigh: (8 x 1.00866)amu = 8.06928amu

Mass of the nucleons = mass of protons + mass of neutrons

                                   = 8.05824amu + 8.06928amu

                                   = 16.12752amu

The mass defect = mass of the nucleons - mass of the atom

                             = 16.12752amu - 15.994914amu

                              = 0.132606amu ≅ 0.13261amu to 5 decimal places

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3 years ago
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