BIOLOGY HIGH SCHOOL

Draws conclusions about the nutritional relationships that exist between fox, rabbit and lettuce

Answers

Answer 1
Answer:

Answer:

Explanation:

According to the nutrition between the fox, the rabbit and the lettuce, it can be concluded:

-All three belong to the food chain of a specific region.

-The lack of any, would make the chain unbalanced, breaking it.

-The fox is a carnivore, so it feeds on the rabbit. While the rabbit is     herbivorous, it feeds on plants.

-The rabbit and the fox are mammals, while the lettuce belongs to the Asteraceae family.

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State one tectonic event affecting North America that occurred the same time as the palisade sill intrusion

Answers

There are many tectonic events happened affecting the North America that occurs during the palisade sill intrusion. One of these is the rifting of North America. This event is called Midcontinent Rift System. It occurs in the center of North American continent. 

A DNA strand has the codon AAT. According to the chart, the corresponding messenger RNA codes for which amino acid?

Answers

Answer:

Asparagine (symbol Asn)

Explanation:

In a gene, groups of three nucleotides (such as AAT) form codons that are read during translation, for the  synthesis of proteins.  The way codons are read can be found in a genetic code (attached here).

Before that, the DNA seuqences are transcripted to RNA sequences in order to be read and translated in the ribosome.

AAT (DNA sequence) will be transformed to  AAU during the transcription of DNA.  This is because during the transciption process all thymines (T) are replaced by Uracils (U).

In the genetic  code you can see that AAU is read as Asparagine.
Because Thymine is "replaced" with Uracil, the corresponding RNA Code for AAT would be UUA.

Quantal analysis shows that a single action potential at the neuromuscular junction causes an EPSP of 40 mV or more, compared to only a few tenths of a millivolt at many CNS synapses. What accounts for this difference? Choose the correct option

Answers

Answer:

A larger number of synaptic vesicles releasing neurotransmitter at the neuromuscular junction compared with CNS synapses

Explanation:

  • A synapse is a junction between two neurons or a neuron and a muscle cell in which a neurotransmitter is released.
  • In this way, a chemical signal can be passed on from one cell to another.
  • In the central nervous system, the number of neurotransmitters being released into the synapse is lesser as compared to the ones being released in the neuromuscular junction.
  • As a greater number of neurotransmitters are being released the excitatory potential of these neurotransmitters will be summed up to a greater extent as compared to the central nervous system and hence, the value of EPSP is greater.

Do anybody know what this is ?

Answers

Answer:

nope

Explanation:

Which form of natural selection on polygenic traits results in the creation of two distinct phenotypes? A. Artificial selection
B. Disruptive selection
C. Directional selection
D. Stabilizing selection

Answers

Which form of natural selection on polygenic traits results in the creation of two distinct phenotypes?   The answer is, B. Disruptive selection

Radium has a half-life of 1,620 years. In how many years will a 1 kg sample of radium decay and reduce to 0.125 kg of radium?3,240 years

6,480 years

4,860 years

1,620 years

Answers

4680 years

1 x .5 = .5

.5 x .5 = .25

.25 x .5 = .125

You multiplied 3 times, so 3 times 1,620 is 4,680.
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