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
Bacteria that can live in extreme environments.
Umnica [9.8K]
Thermophiles................
3 0
3 years ago
Answer these two plssss heeeeelllllllppppp
Irina18 [472]

Answer:

it's 2

I don't know how to explain but yeah its 2

8 0
2 years ago
What is meant by predation?
Yuki888 [10]
The praying of one animal on others.
4 0
3 years ago
Read 2 more answers
How many calories can i eat without gaining weight?
loris [4]
I think that a<span>n average woman needs to eat about 2000 calories per day to maintain, and 1500 calories to lose one pound of weight per week. An average man needs 2500 calories to maintain, and 2000 to lose one pound of weight per week</span>
3 0
2 years ago
Examples of bacteriophage​
dalvyx [7]

Examples of bacteriophages are: 1) Temperate phages (mu and lambda) 2) Filamentous and spherical phages , both having ssDNA (single stranded DNA)

5 0
3 years ago
Other questions:
  • Please can you guys answer all these questions​
    14·2 answers
  • Why would a compound that interferes with bacterial cell wall synthesis be useful for treating a bacterial infection?
    6·1 answer
  • What makes carbohydrates, proteins, and nucleic acids different​
    7·2 answers
  • Compare and contrast the two prokaryotic kingdoms. What is one major difference that is apparent?
    5·2 answers
  • Suppose a scientific team is trying to re-create the energy producing reactions that occur in the sun. What would they need for
    14·2 answers
  • The mass of a rock is a(n) ________________ characteristic of that rock.
    7·2 answers
  • A biological cycle, or rhythm, that is approximately 24 hours long is called a(n) ________ cycle
    6·1 answer
  • _______ are sections of DNA that contain the instructions for building a chain of amino acids which is also called a polypeptide
    7·2 answers
  • Based on the results of this study, what questions remain unanswered? How can these questions guide future research?
    7·2 answers
  • The role of dna in cellular differentaation
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!