Hard calcium carbonate structures are used as skeleton by (a) Echinodermata (b) Protochordata (c) Arthropoda (d) Nematoda

Hard calcium carbonate structures are used as skeleton by

(a) Echinodermata

(b) Protochordata

(c) Arthropoda

(d) Nematoda

Monjur Alahi

9 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

(a) Echinodermata

9 views Answered 2023-02-05 15:29

Related Questions

What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor?

1 Answers 4 Views

Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata

1 Answers 5 Views

In which group of animals, coelom is filled with blood? (a) Arthropoda (b) Annelida (c) Nematoda (d) Echinodermata

1 Answers 4 Views

The feature that is not a characteristic of protochordata? (a) Presence of notochord

1 Answers 4 Views

Real organs are absent in (a) Mollusca (b) Coelenterata (c) Arthropoda (d) Echinodermata

1 Answers 4 Views

Bone matrix is rich in (a) fluoride and calcium (b) calcium and phosphorus (c) calcium and potassium (d) phosphorus and potassium

1 Answers 4 Views

Write the chemical formula of the following: (a) Magnesium chloride (b) Calcium oxide (c) Copper nitrate (d) Aluminium chloride (e) Calcium carbonate

1 Answers 9 Views

On heating calcium carbonate gets converted into calcium oxide and carbon dioxide. (a) Is this a physical or a chemical change?

1 Answers 8 Views

Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?

1 Answers 4 Views

Marble contains ,(A) calcium hydroxide (B) calcium chloride (C) calcium carbonate (D) calcium oxide

1 Answers 5 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)