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enot [183]
3 years ago
6

In an eight-cell embryo of an organism, the cells of the upper tier are aligned over the cells of the lower tier at a slight ang

le. Which organism is it likely to be? The choices are the following: Earthworm. . . . Starfish. . . . Sea cucumber. . . . Sea urchin.
Biology
2 answers:
lakkis [162]3 years ago
8 0

Answer:

Earthworm

Explanation:

Star fish, sea urchin and sea cucumber are echinoderms and exhibit radial cleavage.  The two tiers of cells of their eight cell embryo are aligned directly over each other. Earthworms are annelids and exhibit spiral cleavage during embryonic development in which upper tier of cells made an angle with cells of lower tier in eight celled embryo.

irakobra [83]3 years ago
7 0
<span>I think the correct answer among the choices listed above is option C. The organism described most likely is a starfish. This is because annelids and mollusks exhibit spiral holoblastic cleavage while the echinoderms have radial holoblastic cleavage.</span>
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the

A cstep in solving word problems. Do these in your notebook. ),

1. A clerk is paid P 45.25 per hour for 40 hours a week, 1.50 times the

regular rate for overtime and double the rate for a holiday. How much

holiday?

2. fofkmputer programmer earns a regular hourly rate of P50.00. If he

worked 42.75 hours in a week, how much did he earn?

3. Arthur earns P1350.00 a day. He sets aside 0.10 of this for savings.

How much does he save in a month?

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year?

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his a

on Saturday. If he is paid P25.00 per hour, how much does he earn in

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week?

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