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Reptile [31]
3 years ago
14

2. If a train is traveling east at 75 kilometers per hour, what is its velocity?

Biology
1 answer:
Vedmedyk [2.9K]3 years ago
8 0

75km/hr due east

Explanation:

The velocity of the train will be 75km/hr due east.

  • Velocity is given as the rate of change of displacement with time.

            Velocity = \frac{displacement}{time taken}

  • Velocity is a vector quantity that has both magnitude and directions.
  • It is different from speed because it has the directional attribute.
  • From the given data, we know that the train is moving at 75km per hour. This is the speed of the train.
  • If we incorporate the direction then we have its velocity.

Learn more:

Velocity brainly.com/question/10962624

#learnwithBrainly

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12. A plant has a dominant phenotype but an unknown genotype. The proper experiment to determine its correct genotype would be a
jekas [21]

Answer:

the correct answers are as follows

12:

b. Testcross- an organism with dominant phenotype but unknown genotype is crossed with homozygous recessive organism for the same trait. Based on the results obtained, if all offsprings have the same phenotype, then the parent is homozygous, but when a 1:1 ratio is observed in the offsprings, then the parent is heterozygous.

13.

e. Watson and Crick- they both used the crystallographic images from Franklin, analyzed them to first elucidate the 3D structure of the DNA and propose it to the world.

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c. Intracellular and commonly found in the cytoplasm- the receptors of steroid hormones are generally present within the target cell either in the cytoplasm or nucleus, since they alter gene expression.

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e. Certain prokaryotes/bacteria- this is a process that will enable disease-causing pathogens to communicate and cooperate with their group, by the release of autoinducers that increase their cell density.

5 0
3 years ago
All vertebrate embryos have _____ at some point during embryonic development, indicating a common evolutionary ancestor
aivan3 [116]

All chordates chare four structures. One of the is the tail. All vertebrate embryos have _<u>a tail</u>__ at some point during embryonic development, indicating a common evolutionary ancestor.

<h3>What is the relationship between chordates?</h3>

The evolutionary relationship between species is reflected in the similarities or differences in the patterns of embryonic development.

All chordates belong to the Chordata phylum, and share four main characteristics,

  1. Notochord, which is a precursor of the dorsal spine.
  2. Nerv cord, dorsally located and parallel to the notochord.
  3. Pharyngeal clefts
  4. Tail

All chordates express these structures at some point in their lives, especially in the early stages of embryogenesis. Many of them can be lost with animal development and become vestigial structures.

The tail is a vestigial structure in many vertebrates.

Vestigial structures are those body parts, genetically determined, that have been retained during the evolution of the taxonomic group but have lost or reduced their original function.

Such vestigial structures were plenty functional in the ancestors of new species, but now are typically degenerate, stunted, or rudimentary, and tend to be much more variable than homologous non-vestigial parts

All vertebrates develop a tail at some point in their embryonic life, even humans. However, this structure lost its original function in several species, so after a period of embryogenesis, this tail disappears, and its forming vertebras get fussed with each other composing the coccyx.

In many animals, the function of the tail is to stabilize, equilibrate and mobilize. But in humans, for instance, the coccyx has lost this function but is still an area of muscle insertion.

The correct option is Tail.

All vertebrate embryos have _<u>a </u><u>tail</u><u>_</u> at some point during embryonic development, indicating a common evolutionary ancestor.

You can learn more about chordates at

brainly.com/question/12406059

#SPJ1

3 0
2 years ago
Ad each question completely before writing your answer.
DanielleElmas [232]

Answer:

it is A neuron

Explanation:

may I get brainliest

8 0
2 years ago
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24 pts!
Ne4ueva [31]
The answer is B

Explanation: RNA is single stranded and contain uracil
6 0
3 years ago
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What is the Relationship between color and wavelength absorbed?
satela [25.4K]

Red Orange Yellow Green Blue Indigo Violet

<---Longest wave length                     shortest wave length--->

As you went down the colors of the rainbow the wave length got shorter or faster.

6 0
3 years ago
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