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saul85 [17]
3 years ago
6

1. All cells are derived from _____________________

Biology
1 answer:
Inessa [10]3 years ago
5 0
1.other cells
2. Growth, reproduction
4.nucleus
6. It makes 2
10.46
——————————-

5. Sex chromosomes
6. XX is female, XY is male

—————
3.zygote
4. No


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Which of the following shows the levels of organization in the human body from the smallest unit to largest unit?
den301095 [7]
D. Should be the correct answer
7 0
3 years ago
Sound travels fastest in matter that has relatively ______ densities.
Jobisdone [24]

Answer:

low

Explanation:

8 0
3 years ago
Rank the sequence of events at the NMJ that initiate an action potential in the muscle fiber, from first to last.
wlad13 [49]

The correct order is:

- Action potential arrives at the axon terminal.

- Calcium ions enter the axon terminal.

- Synaptic vesicles fuse to membrane of axon terminal.

- Acetylcholine is released into the synaptic cleft.

- Acetylcholine binds to its receptors on the junctional folds.

- Junctional folds become depolarized.

- Action potential is initiated on the sarcolemma.

Action potential travels through the membrane of the presynaptic cell causing the channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine). Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells. Neurotransmitter binds to its receptors on the postsynaptic membrane and its binding causes depolarization of the target cell (muscle cell).

4 0
3 years ago
Ann took 4 glasses of water with different colors, then placed cabbage in it. She observed the setting before and after 8 hrs. W
maw [93]

Plants absorb water from the ground. In the experiment, we can see that cabbage leaves take water from the glasses through the process of transpiration. Together with water the leaves absorb the pigments.

<h3 />

Experiment      

1) Four glasses of water, each with a different color ⇒ red, blue, yellow, orange

2) One or two cabbage leaves are placed in each glass and left there for eight hours.

3) After 8 hours, the leafs turn into the color of the colored-water in which they are placed.

<h3>Explanation</h3>

When placing cabbage leaves in the glasses, they start to absorb water from the stems.

As they absorb water to drive it to other parts of the leaf, they also absorb the pigments that are giving color to the water.

As time passes by, the leaves acquire the same color as the water.

<h3>Water absorption: Transpiration</h3>

Plants absorb water from the ground. This process is known as transpiration.

Roots are the first organ that gets in touch with water.

The xylem in roots and stems is in charge of this process.

The xylem composes the vascular system that transports water and minerals through its vessels and tracheids from the roots to the aerial parts of the plants.

Water can move from the ground to the aerial parts of the plant thanks to osmosis and hydric gradient potential.

You will learn more about plants water absorption at

brainly.com/question/13199665

brainly.com/question/994720

brainly.com/question/18830324

4 0
2 years ago
For the purposes of medical treatment only, the categories of drugs that can be legally prescribed listed from most to least res
oksian1 [2.3K]

Answer:

d) II, III, IV, V, Rx, OTC

Explanation:

Based on its potential lethality, harm, addiction potential etc. drugs can be divided into five groups (drug schedule). Schedule I drugs are most restrictive and are not used in treatment and have extremely high addiction potential (heroin, for example). They are illegal substances and are not used in medical treatment. Going down to schedule V drugs are becoming less and less harmful and restricted with less potential for abuse.

Rx drugs are the ones that require a prescription in order to be purchased in the pharmacy.

OTC drugs are, so-called "over the counter" drugs, which can be purchased without prescription, making them the least restrictive.

So, the correct streak, from most to least restrictive drug, is:

II -> III -> IV -> V -> Rx -> OTC

6 0
3 years ago
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