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Bas_tet [7]
3 years ago
10

What are some common animal traits that a starfish does not possess? Explain why the starfish is not classified as a vertebrate

species.​
Biology
1 answer:
kykrilka [37]3 years ago
6 0

Answer:

See explanation below.

Explanation:

Starfish, also known as sea stars, are marine organisms that belong to the Class Asteroidea. They are considered invertebrates because they lack a vertebral column. Moreover, most starfish species have five arms but some species can have up to 15!

Here are some characteristics that differentiate starfish from other organisms and make them so unique:

  • Possession of tube feet.
  • Most species have pedicellaria, claw-shaped structures with movable jaws.
  • Radial symmetry
  • They can possess from 5 to 15 arms.
  • Do not possess brain.
  • They can regenerate parts of their body.

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Rhonda Runsalot is a 20 year old woman. She is running at VO2max. Her heart rate is 200 b/min. Her stroke volume is 100 ml blood
katen-ka-za [31]

Answer:

Cardiac output = 20 L/min

Explanation:

The cardiac output of a person refers to the volume of blood the heart pumps in a minute. The normal range for cardiac output is about 4 to 8 L/min. However, this can vary depending on the metabolic needs of the individual at any instant of time, for example, it is higher when exercising than  when resting.

Cardiac output is calculated from the product of the stroke volume in liters/min and the heart rate in beats/min

Cardiac output  = stroke volume * heart rate

For the individual who is running; stroke volume = 100 mL/beat or 0.1 L/beat

heart rate = 200 beats/min

Cardiac output =0.1 L/beat * 200 beats/min

Cardiac output = 20 L/min

6 0
2 years ago
Help please I will give brainliest with #3
Vlad1618 [11]

Answer:

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Explanation:

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8 0
2 years ago
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Why does a hormone only act on specific cell types in an organism and not others?
Vilka [71]

Answer:

c) A cell must have the appropriate receptor before it can bind to the hormone.

Explanation:

Hormones are chemical signals that are secreted into the circulatory system acting as regulators within the body, and even though they can reach any part on the body, <em>only certain types of cells are equipped to respond, these cells are known as target cells, when the hormone reaches a cell with an adequate receptors it triggers a signal transduction and then a response.</em>

Therefore the correct answer is c.

I hope you find this information useful and interesting! Good luck!

5 0
3 years ago
Which of the following has mechanical energy?
marshall27 [118]
D. Visible light . Is the correct answer I hope this helps:)
4 0
3 years ago
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Which type of bone is indicated by the arrow? long irregular flat short
nlexa [21]

The answer is long

The bone indicated by the arrow is femur bone. It should be classified as the long bone. Other example for long bones would be tibia and fibula. Short bone would be carpal or tarsal bones. Flat bone could be found in skull. Irregular bone would be the vertebrae or pelvic.

8 0
3 years ago
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