The collision theory<span> is based on the assumption that for a reaction to occur it is necessary for the reacting species atoms or molecules to come together or </span>collide<span> with one another.\</span>
The plasma membrane needs lipids, which make a semi-permeable barrier between the cell and its environment. It also needs proteins, which are involved in cross-membrane transport and cell communication, and carbohydrates, which decorate both the proteins and lipids and help cells recognize each other. Hope this helps :)
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The answer is C. F
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Answer:
Characteristics of Annelida: Plesiomorphies and Other Features
Symmetry and Size. Annelids are all bilaterally symmetrical animals. ...
Coelom. Nearly all annelids have a fluid-filled cavity between the outer body wall and the gut, and this is referred to as a coelom (Figure 1). ...
Body wall. ...
Parapodia. ...
Nervous system. ...
Sense organs. ...
Circulation and respiratory structures. ...
Segmental organs.
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hope this helped!
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Here give it to her now but she copy and pasted and I got in trouble...
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