1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yarga [219]
3 years ago
12

The crown-of-thorns sea star, Acanthaster planci, preys on the flesh of live coral. If coral animals are attacked by these sea s

tars, then what actually provides nutrition to the sea star, and which chemical (besides the toxin within their nematocysts) do the corals rely on for protection?
A) medusae; silica
B) polyps; silica
C) exoskeleton; calcium carbonate
D) polyps; calcium carbonate
Biology
2 answers:
julsineya [31]3 years ago
8 0

Answer:

d) polyps; calcium carbonate

Explanation:

The Acanthaster planci It is a kind of invasive starfish, which destroys corals: it has poisonous spines and feeds on coral polyps at the expense of the reef.

On the other hand, CO2 reacts with water, forming carbonic acid and reducing the available calcium carbonate, an essential element so that marine organisms, from clams to hedgehogs, can form their skeletons and shells.

Rufina [12.5K]3 years ago
5 0

Answer:  The correct answer is :  D) polyps; calcium carbonate

Explanation:  This starfish feeds exclusively on hard corals. It can be brown, dark gray, purple, orange or red, the difference in color lies in the food they eat. It has its body covered with thorns that uses them as a means of defense.

You might be interested in
Que es la biogenesis
ira [324]

La biogénesis es el proceso fundamental de los seres vivos que producen otros seres vivos. Ejemplo: una araña pone huevos de los que saldrán más arañas. La biogénesis es aquel principio según el cual la vida solamente se origina de una vida preexistente (que ha existido antes).

3 0
3 years ago
2. A mutation is any change in the DNA of a gene.
givi [52]
D) a change in protein synthesis
3 0
1 year ago
Read 2 more answers
Explain how the basic structure of an atom has led to the diversity of compounds making up living and nonliving things
kobusy [5.1K]

Atom refers to a tiny particle, which is the basic building block of all the substances and whose properties determine the characteristics of an element made up of only of those atoms.  

All the living and nonliving matter in this world are made up of atoms and elements. Everything in the universe is matter, and matter comprises elements. Some of the elements are important to living things.  

Elements are formed by atoms, and atoms comprise protons, electrons, and neutrons. The number of protons in an element's atom signifies the identity of the element.  


5 0
3 years ago
Why Do More Species Live Near the Equator? 5 reason why
PtichkaEL [24]

Answer:Species Dynamics. This theory is quite straightforward: species that can colonize new areas faster and reproduce in greater number than they become extinct have the greatest chances to thrive. The tropics offer favorable conditions for these conditions to be met.    

There Is More Diversity Near the Equator. ... Another argues that more solar energy is received around the equator, allowing for greater species richness. A third points out that equatorial tropics are the largest biome, so it makes sense that there would be more species.

Explanation:

8 0
3 years ago
I absolutely need help now! is it possible for populations to be affected by weather? Give Examples
lbvjy [14]
Yes of course!
In the most catastrophic case, it can kill hundreds of thousands through hurricanes and the things that come with hurricanes. 
Droughts can cause death by both dehydration and starvation if the rain is the only dependable source of arrogation 
Too much rain causes floods which can be fatal too
3 0
3 years ago
Read 2 more answers
Other questions:
  • What is an allele? a dna sequence different versions of a gene a hairstyle a physical trait?
    5·1 answer
  • Some human diseases cause a malfunction in protein phosphatases. Describe a protein phosphatase and its role in cell signaling,
    14·1 answer
  • What are the symptoms of a scorpion sting?
    10·1 answer
  • What animals or parts of animals were used to make glues
    11·2 answers
  • The soft palate reflexively opens the nasopharynx to allow the passage of food, which is now called a bolus.
    6·1 answer
  • The change in weather is what causes the change in seasons?
    7·2 answers
  • Three young children are fighting over where to take
    14·1 answer
  • Why is natural selection not random
    12·1 answer
  • How does the index of refraction of the unknown substance compare to the index of refraction of a vacuum?
    14·1 answer
  • _______ is the nitrogen fixing bacteria.​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!