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jolli1 [7]
3 years ago
15

Why is it said that the earthworm has a closed circulatory system?

Biology
1 answer:
Ratling [72]3 years ago
7 0
The earthworm has a closed circulatory system. An earthwormcirculates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm. These vessels are the aortic arches, dorsal blood vessels, and ventral blood vessel
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What does circe predict will occur if odysseus raids the cattle of helios?
pantera1 [17]
All of his men will die and he will not make it home in which he plans.
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3 years ago
Living things require specific organic molecules in order to survive. The picture above represents some specific examples of foo
Helga [31]
Living things require specific organic molecules in order to survive. The picture above represents some specific examples of foods that are mainly composed of one of these necessary organic molecules. The organic molecules found in these types of food are

B) proteins.
4 0
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Are butane and isobutane structural isomers
uysha [10]
Yes, Butane has its four carbon atoms bonded in a continuous chain. Isobutane has a branched structure.

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3 0
3 years ago
Using the information from problem 11, scientists do a further test cross using a heterozygote for height and nose morphology. T
mote1985 [20]

Answer:

The recombinant frequency between T and S is  18%;

The correct Sequence of genes is T-A-S

Explanation:

The table below shows the recombinant frequency between heterozygous height and nose morphology:

Tall-uptrend snout                            40%                            Expected

Dwarf-downtrend snout                   42%                            Expected

Dwarf-uptrend snout                         9%                             Recombinant

Tall-uptrend snout                             9%                             Recombinant

Sum Total                                           100%

To calculate the recombinant frequency; we have :

=9+9

=18%

Hence, the recombinant frequency between T and S = 18%

The determinant of the corect sequence of the genes is  T-A-S

4 0
3 years ago
Meselson and Stahl's experiments proved that DNA replicates by which mode?
Irina18 [472]

Answer:

Semi-conservative

Explanation:

Meselson–Stahl experiment proved that DNA replication is a semiconservative process, feeding E. colo bacteria with different types of Nitrogen isotopes (N14 and N15).

Changing the type of radioactive compound in different times of bacteria grow, they could observe that both of the isotopes were present on the bacteria culture.

Basically, if the bacteria present both of them, the DNA was replicated semiconcervely.

Guess what? they show both! (See the image for more information)

6 0
3 years ago
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