Consider the following statements regarding different types of animals: 1. Cnidarians are acoelomate 2. All sponges (Porifera) are marineare marine 3. Flatworms (Platyhelminthes) can produce asexually 4. In arthropods, fertilisation is always internal. Wh

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Q: 69 (CDS-I/2002)
Consider the following statements regarding different types of animals:
1. Cnidarians are acoelomate
2. All sponges (Porifera) are marineare marine
3. Flatworms (Platyhelminthes) can produce asexually
4. In arthropods, fertilisation is always internal.
Which of these statements is/are correct?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,16,44,10,32,16,2

keywords: 

{'arthropods': [0, 0, 1, 0], 'different types': [0, 0, 1, 2], 'flatworms': [0, 0, 2, 0], 'fertilisation': [1, 0, 0, 0], 'cnidarians': [0, 0, 1, 1], 'sponges': [1, 0, 1, 1], 'animals': [0, 0, 1, 2], 'platyhelminthes': [1, 0, 0, 0], 'porifera': [1, 0, 1, 1]}

The correct answer to this question is option 3: 2, 3, and 4.

Let`s dissect each statement to better understand why they are correct or incorrect:

Statement 1: "Cnidarians are acoelomate." Acoelomate refers to animals that lack a body cavity. This statement is correct because cnidarians, such as jellyfish and corals, do not possess a true body cavity.

Statement 2: "All sponges (Porifera) are marine." This statement is incorrect because not all sponges are marine. While the majority of sponges are found in marine environments, there are also freshwater species of sponges.

Statement 3: "Flatworms (Platyhelminthes) can produce asexually." This statement is correct. Flatworms have the ability to reproduce both sexually and asexually, depending on the species and environmental conditions.

Statement 4: "In arthropods, fertilisation is always internal." This statement is also correct. Arthropods, such as insects and crustaceans, typically have internal fertilization, where the sperm is transferred directly to the female reproductive organs.

In summary, statement 1 is correct, statement