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3 years ago

Which of the following is a characteristic of vertebrates

1 answer:

5 0

A vertebrate is an animal with a spinal cord surrounded by cartilage or bone. The word comes from vertebrae, the bones that make up the spine. Animals that are not vertebrates are called invertebrates. Vertebrates include birds, fish, amphibians, reptiles, and mammals.

Vertebrate Characteristics

General characteristics of the sub-phylum Vertebrata are as follows:
Vertebrates have a well developed brain.Brain is set inside a bony box, known as cranium.Notochord is present in all chordates during sometime of development, it is formed on the dorsal side of the primitive gut in the early embryo stage.Most vertebrates possess guts with a non-terminal anus. The mouth cavity and the oesophagus is connected by the pharyngeal gill slits to a muscular tube pharynx, which opens to the exterior.They possess a dorsal hollow nerve tube at some stage of their life. Possess a dorsal cartilaginous nerve rod known as the notochord. At some stage of their life possess gill slits in the pharyngeal region.Have partially open circulatory system.Possess two pairs of appendages.The endoskeleton is made of cartilage or bone.The first vertebrates were jawless fishes with single caudal fin.The advancement of vertebrates with a hinged jaw which opened new food options and jawed fishes became the dominant creatures in the sea.All vertebrates have a heart and closed circulatory system.Reproduction is normally sexual.Feed on variety of organic materials.Unisexual animals, have one pair of gonads.

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The brain volumes (cm cubed) of 20 brains have a mean of 1116.2 cm cubed and a standard deviation of 127.7 cm cubed. Use the g

Shkiper50 [21]

Answer:

Yes

Explanation:

Range rule of thumb predicts the Range to be a multiple of 4 of the standard deviation or to be four times the standard deviation. Making the usual values equal to 2 standard deviations distanct of the mean of the data distribution.

In a given distribution with mean and standard deviation that is obtained, the usual values in mean (as seen in the attached image).

2*standard deviation and mean + 2*standard deviation.

If the data point is not up to the mean

- 2* standard deviation is taken to be significantly low.

If the data point is more than the mean

+ 2*standard deviation is taken to be significantly high.

Let's take the xbar to be the mean and s as standard deviaiton

Given,

mean, xbar = 1116.2

standard deviation, s =127.7

The range rule of thumb shows that the usual values are within 2 standard deviations from the mean

Lower boundary

= xbar - 2s

= 1116.2 - 2(127.7)

= 860.8

Upper boundary

= xbar + 2s

= 1116.2 + 2(127.7)

= 1371.6

We should note that 1411.6 is not between 860.8 and 1371.6, which connotes that 1411.6cm^3 is unusually high.

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Which type of wetland restoration project involves making a deep cut in a riverbank and

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