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marusya05 [52]
3 years ago
13

What is an echinoderm with long spines?

Biology
1 answer:
alukav5142 [94]3 years ago
7 0

The echinoderm with long spines belongs to the class Echinoidea which includes sea urchins, heart urchins, cake urchins and sand dollars. This spine serves as their protective mechanism from predators. The spines are joined to the skeleton and muscles surround it. The muscles enable them to swivel its spines from predators.

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What happens to a developing child first ?
Alenkinab [10]

Answer:

Out of the given changes, developing hands is the first change to take place in a child.

This change occurs in the fifth week of life. By six and a half weeks, the embryo begins to move its hands and they undergo the most dramatic change between the sixth and seven week. The digits have formed by the seventh weeks and they are individual and fully separated by seven and a half weeks.

Read more on Brainly.com - brainly.com/question/4149327#readmore

8 0
3 years ago
What occurs during a solar eclipse? Select two options.
bearhunter [10]

Answer:

the moon's shadow falls on earth

Explanation:

the sun is behind the moon

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3 years ago
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All living things are classified into kingdoms based on specific characteristics. Which of the following are only characteristic
Valentin [98]

Answer:

  1. divided into phyla
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3 years ago
What are the three types of anthrax infection (prior to 2010, when a fourth type was added)? Describe each type.
Westkost [7]

Answer:

1) Cutaneous Anthrax

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3) gastrointestinal anthrax - this cause due to the eating of contaminated meat which results in nausea,  diarrhea, abdominal pain, etc.

8 0
3 years ago
Choose ALL that apply: Changes the APPARENT WAVELENGTH of the light. 1 point
Nataly_w [17]

Answer:

The correct answer is "Red shift"

Explanation:

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Red shift: When the source and observer move away from one another, the clear frequency diminishes or apparent wavelength increments. Here the Doppler shift is negative. This is known as red shift.

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3 years ago
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