What multicellular forms of life evolved from the early single-celled organisms

pishuonlain [190]

Answer: Mitochondria

Explanation: The mitochondria make energy within the cell

6 0

3 years ago

An inhibitory stimulus has occurred. B. Chemically gated potassium channels have opened. C. Excessive potassium has diffused out

andrezito [222]

Given question is incomplete. Complete question has been attached.

Answer:

C. Excessive potassium has diffused out causing hyperpolarization.

Explanation:

The nerve action potential can be divided into following stages:

Stimulus is detected by the cell in resting stage.
Sodium channels in the membrane open from where influx of sodium ions occur which is called depolarization
After a while, sodium channels close and potassium channels open from where efflux of potassium ions occur which is called repolarization.
The membrane potential further lowers due to continous efflux of potassium ions which is called hyperpolarization.
After a while potassium channels close and membrane returns to its resting stage.

In the given figure, stage 4 depicts hyperpolarization because the membrane potential has dropped to the lowest point below -70mV. Hence, option C is correct.

7 0

3 years ago

tasha notices that even though she stops pulling the wagon, her brother’s body moves forward. which of newton’s law of motion ex

expeople1 [14]

Answer:

Newton's first law.

Explanation:

The first law, in which an object moves forward in a straight line unless acted on by an outside force. It describes Inertia it the inherent property of the body due to which it opposes any change in its state of motion or rest. So due to Inertia, Tasha's brother's body moved forward.

6 0

3 years ago

2. Which type of microscope can produce three-dimensional images of a cell’s surface? A. transmission electron microscope B. sca

zlopas [31]

The type of microscope of advanced technology that can produce 3D mages of a cell’s surface is an electron microscope. This microscope uses electron signals to project the surfaces of the cells. The difference between a <span>prokaryotic cell and a eukaryotic cell is the presence of the nucleus. The nucleus is the center of all processes of the cell</span>

5 0

3 years ago

Read 2 more answers

With what kinds of bacteria did Griffith inject mice

Aneli [31]

<span>The S strain of bacteria that Griffith used was virulent meaning that when injected into the mouse, the mouse would die from pneumonia The R strain was nonvirulent and did not result in the death of the mouse. When Griffith injected mice with a dead S strain of pneumatic bacteria the mice remained healthy.

I hope this helps!
</span>

3 0

3 years ago