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Temka [501]
3 years ago
10

Because they lack well-defined and complex organ systems, we hypothesize that _____ diverged from all other animals early in the

evolution of animals.
poriferans
choanoflagellates
bilaterians
None of the answer options is correct.
Biology
1 answer:
astraxan [27]3 years ago
4 0

Answer:

Poriferans.

Explanation:

The evolution of the organisms has been occur from the simple organisms and leads to the evolution of the more complex organisms. This complexity arises due to the changing environment of the organisms.

The protozoans are the simplest organisms and all the other animal lineage has been derived from the porifera. The porifera are the cellular organisms that  do not have tissue level of organization and simple physiological system. Later, diverse and complex organisms arise from the porifera.

Thus, the correct answer is option (1).

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3 years ago
For the following free body diagrams identify if the forces are balanced or unbalanced. Then determine the net force if it is no
antoniya [11.8K]

In all cases, except case 1 the forces are unbalanced, and therefore, the net force is different from 0.

<h3>How forces act?</h3>

In physics, forces are balanced if opposite forces have the same magnitude, for example:

  • If two people are pulling a rope with a 5N force the forces are balanced and the rope will not move.

Based on this, from the diagrams presented only diagram 1 has balanced forces because this is the only case in which opposite forces have the same magnitude.

<h3>Let's calculate the net force in each case or the total sum of forces. </h3>

To do this, consider that forces pointing upwards and to the right are positive.

Case 1

  • Net force: 10 N + 10 N - 10 N - 10 N = 0 N

Case 2

  • Net force: 10N + 15 N - 10 N - 10 N  = 5 N
  • The direction of this object is to the right because the strongest force goes in that direction.

Case 3

  • Net force: 17 N + 17 N - 10 N - 12 N = 12 N
  • The direction of this object is to the right and upwards because these are the two strongest forces.

Case 4

  • Net force: 17N + 10 N - 10N - 12 N = 5 N
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Learn more about force in: brainly.com/question/4456579

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Harlamova29_29 [7]

Answer:

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Explanation: hope this helps

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