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3 years ago

What are the characteristics of supernovae?

2 answers:

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Ans: As the star runs out of nuclear fuel, some of its mass flows into its core. Eventually, the core is so heavy that it cannot withstand its own gravitational force. The core collapses, which results in the giant explosion of a supernova. The sun is a single star, but it does not have enough mass to become a supernova.

Veseljchak [2.6K]3 years ago

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As the star runs out of nuclear fuel, some of its mass flows into its core. Eventually, the core is so heavy that it cannot withstand its own gravitational force. The core collapses, which results in the giant explosion of a supernova. The sun is a single star, but it does not have enough mass to become a supernova.

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How do exogrya and pycnodonte differ from modern day oysters?

fredd [130]

Answer:

This oyster occurs very commonly in the oyster beds of the Navesink formation at Big Brook. from Exogyra by its non-spiral nature and lack of ornamentation. Size: Pycnodonte can be between 2 to 10 cm (about . ... Some older sources label the genera of this oyster as Gryphaea.

<h3>#carryONlearning </h3>

8 0

2 years ago

Bacterial cultures are sometimes exposed to ultraviolet (UV) light in order to generate organisms with new genetic traits. Why d

const2013 [10]

<h2>Ultraviolet (UV) Light</h2>

Explanation:

<em>Ultraviolet germicidal irradiation (UVGI)</em> is a purification technique that inactivate microorganisms and the short wavelength ultraviolet (UV-C) light to execute by destroying nucleic acids and upsetting their DNA, leaving them incapable to vital cellular functions.
<em>Ultraviolet (UV) light kills cells damaging their DNA</em>
<em>The subsequent thymine dimer is very stable,</em> however fix of this sort of DNA harm for the most part by extracting or expelling the two bases and filling in the holes with new nucleotides is fairly efficient.
UV light applies its mutagenic impact by energizing <em>electrons in atoms</em>
<em>The excitation of electrons in DNA atoms regularly brings about the development of extra bonds between contiguous pyrimidines (explicitly thymine) in DNA</em>

7 0

3 years ago

When true breeding brown dogs are mated with certain true breeding white dogs, all of the F1 pups are white. The F2 progeny from

spayn [35]

Answer:

The results indicate that two independently assorting genes are involved (modified 9:3:3:1 ratio), with white blocking the expression of color by the other gene. The ratio of white : color pups is 3:1, indicating that the F.1 is heterogeneous (W/w). Among colored dogs, the ratio is 3 black : 1 brown, indicating that black is dominant to brown, and the F.1 is heterogeneous (B/b). The original brown dog is w/w ; b/b, and the original white dog is W/W ; B/B. The F.1 progeny are W/w ; B/b, and the F.2 progeny are: 12: 3: 1.

9 W/- ; B/-

3 W/- ; b/b

3 w/w ; B/-

1 w/w ; b/b

white

black

brown

7 0

3 years ago

a diver with a mass of 60 Kg is standing on the top of a 10 meter high platform. what is the mechanical energy

inna [77]

Answer:

M.E = 5880 J

Explanation:

Given data:

Mass = 60 Kg

Height = 10 m

Mechanical energy = ?

Solution:

Formula:

M.E = K.F + P.E

K.E = 1/2 × mv²

P.E = mgh

Diver is not moving so K.E will be zero.

M.E = mgh

M.E = 60 kg × 9.8 m/s² × 10 m

M.E = 5880 J ( j= kg m²/s²)

7 0

3 years ago

How do environmental factors contribute to evolution by natural selection?

konstantin123 [22]

Environmental factors change the amount of genetic variation in a population.

6 0

3 years ago