Question

1) the human heart Starts beating around______days of embryonic development
A) 22
B) 21
C) 23
D) 24
2) Sponges create their own water currents by beating of:
A) cilla
B) pseudopodia
C) flagella
D) tentacles
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Answer 1

Answer:

ans: 22 - 23 days . If it helpful for other student iam happy

Answer 2

Answer:

1. B) 21 days

2. C) flagella

Explanation:

hope it helps you