Question

no explaination is needed, I will give a thumb, thanks!

5. Which of the following is descriptive of protostomes? a) spiral and indeterminate cleavage, blastopore becomes mouth b) spiral and determinate cleavage, blastopore becomes mouth c) spiral and determinate cleavage, blastopore becomes anus d) radial and determinate cleavage, blastopore becomes anus Which of the following is a diploblastic phylum of aquatic predators? a) Cnidaria b) Annelida c) Mollusca d) Arthropoda 7. Chordate pharyngeal slits appear to have functioned first as a) the digestive system's opening. b) suspension-feeding devices. c) components of the jaw. d) gill slits for respiration.

Answer 1

5. The correct answer is B.

6. The correct answer is A. All except cnidaria are triploblastic.

7. The correct answer is B. Pharyngeal slits were thought to function as suspension-feeding devices; a function that is retained in many primitive.

15. The correct answer is C. In hermaphroditism, a single individual produces both sperm and eggs. So it is a form of sexual reproduction in which an animal produces both eggs and sperm.

29. The correct answer is C. The function of the thyroid gland is to take iodine, found in many foods, and convert it into thyroid hormones: thyroxine (T4) and triiodothyronine (T3).

41. The correct answer is D. Bacteria do not contain membrane-bound organelles such as mitochondria or chloroplasts.