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2 years ago

How did Kepler develop his second law of motion?(1 point)

Biology

1 answer:

AURORKA [14]2 years ago

3 0

Answer:

Explanation:

c He compared data of planetary motion at different times along orbits.

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HELP ASAP DUE NOW PLSSS HELP 10 points and brainlist Which arrows show matter moving from a producer to an omnivore? Select all

kobusy [5.1K]

Answer:

my best guess is number answer 2 and answer 4

because crows love to eat desert woodrats and for the last one i watched it in national geo, its like a cycle grass hopper died by a mouse dies by a rattle snake.

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2 years ago

What does this article reveal about the role Black inventors have played in America's history? Explain your answer.

cupoosta [38]

Answer:

The article revealed the fact that Black inventors have always played an active role in inventing new things in America. In the 18th and 19th centuries they were denied the right to patent their inventions because of their status as slaves. This has changed for the better in present times as many Black inventors are being granted patent rights.

Explanation:

The article, "America’s always had black inventors – even when the patent system explicitly excluded them", by Shontavia Johnson, explained the active role that Black Americans, both free and slaves played in inventing things in the United Slaves. The article explained that although the patent rights signed into the constitution in 1787 was written in a neutral tone, it did not change the fact that black inventors were actually denied patent rights.

This segregation affected people like Henry Boyd, Ned, Benjamin Montgomery among others. In recent times, this segregation has significantly been curbed as many Black inventors are now owners of patents. An example is Lonnie Johnson, inventor of the Water Gun and owner of more than 80 patents.

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2 years ago

Which change of state is shown in the model? condensation, boiling, sublimation or freezing

pishuonlain [190]

Answer:

Freezing.

Explanation:

5 0

3 years ago

Read 2 more answers

State how the amino acid sequence you obtained from the gene fragment for botana curus compares with the sequences for the other

coldgirl [10]

The amino acid sequence in protein from the gene fragment for botana curus is the same with species Z that is valine, histidine, leucine, threonine, proline, glutamine and glutamine. Meanwhile, species X and species Y has different amino acid sequence compared to botana curus. Therefore, species Z is most closely related to botana curus because both species has the same amino acid sequence and has similar sized DNA fragments.

3 0

3 years ago

Read 2 more answers

If A/A ⋅ B/B is crossed with a/a ⋅ b/b and the F1 is testcrossed, what percentage of the testcross progeny will be a/a ⋅ b/b if

Alex787 [66]

Answer:

a) 25%; b) 50%; c) 45%; d) 38%

Explanation:

<h3 /><h3>a) Unlinked genes</h3>

A/A B/B X a/a b/b

F1: A/a B/b

Testcross A/a B/b X a/a b/b

The homozygous recessive individual only produces <em>ab</em><em> </em>gametes.

The F1 produces four types of gametes (each of them with a frequency of 1/4): <em>AB</em>, <em>Ab</em>, <em>aB </em>and <em>ab</em>.

25% of the progeny will be a/a b/b.

<h3>b) Completely linked genes</h3>

AB/AB X ab/ab

F1: AB/ab

Testcross AB/ab X ab/ab

The F1 produces only two types of gametes, the parentals (each of them with a frequency of 1/2): <em>AB</em> and <em>ab</em>.

50% of the progeny will be ab/ab.

<h3>c) 10 m.u. apart</h3>

AB/AB X ab/ab

F1: AB/ab

Testcross AB/ab X ab/ab

The F1 produces four types of gametes, the parentals <em>AB</em> and <em>ab </em>and the recombinants <em>Ab</em> and <em>aB</em>.

Since the genes are 10mu apart, 10% of the produced gametes will be recombinant and 90% will be parentals. Since there are two types of parental gametes, each of them has a frequency of 45%.

45% of the progeny will be ab/ab.

<h3>d) 24 m.u. apart</h3>

This is very similar to c).

Since the genes are 24mu apart, 24% of the produced gametes will be recombinant and 76% will be parentals. Since there are two types of parental gametes, each of them has a frequency of 38%.

38% of the progeny will be ab/ab.

5 0

2 years ago