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astraxan [27]
3 years ago
12

Can somebody help me out!!

Biology
1 answer:
Julli [10]3 years ago
4 0
I know that ii is one. I think that’s it. I may be wrong but that’s all I could find!
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Is it yes or no? I’ll brainliest u if u get it right!
Gelneren [198K]

Answer:

No

Explanation:

I think No. because matter can neither be created nor destroyed...chemical change cannot alter the number of atoms in a given reaction. The atoms can only rearrange so that it can yield a new molecule/compound but the number of atoms should stay the same.

8 0
3 years ago
Which of the following describes a properly controlled experiment?
netineya [11]

Answer:

Option D, Five radish plants are grown in sunlight, while another five radish plants are kept in the dark.

Explanation:

In a controlled experiment, impact of one independent variable is studied on the dependent variable.  

Here in this study sunlight is the independent variable while the radish plant is dependent variable.  

The researcher wants to study the effect of sunlight on radish plants when they are exposed to it   and compare it to the effect created on radish plants  that are kept in dark.  

Hence option D is correct.

3 0
3 years ago
Read 2 more answers
What organelles synthesizes cells?
stiks02 [169]
Ribosomes and endoplasmic reticulum
7 0
3 years ago
Some people have low levels of calcium circulating in the blood, a condition known as hypocalcemia. while for many this disorder
kap26 [50]

Answer:

low level of calcium would result in fewer signals sent between pre and post synaptic cells.

Explanation:

The calcium has a main role in signal transmission mechanism and here is the mechanism :

1-the impulse reaches the synapse (depolarization which is a voltage change).

2-the voltage gated calcium channels open and let calcium flow into the cell.

3-the calcium causes the synaptic vesicles to rupture and release chemical transmitters which cross the synaptic cleft and finally bind to receptors on the post synaptic cell (transmitting the signal)

so it's obvious that if calcium concentration decreases, the signal transmission also decreases.

8 0
3 years ago
The function of centrosome in plant cell is performed by
Andrews [41]
<span>Centrosomes are made of from arrangement of two barrel-shaped clusters of microtubules, called “centrioles,” and a complex of proteins that help additional microtubules to form.</span>
4 0
3 years ago
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