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malfutka [58]
3 years ago
5

Step 1- Investigative Question

Biology
1 answer:
larisa86 [58]3 years ago
7 0

Answer:

Eggshells are made of calcium carbonate. If you soak an egg in vinegar the eggshell will absorb the acid and break down, or dissolve. The calcium carbonate will become carbon dioxide gas, which will go into the air.

Explanation:

It will bounce.

I believe that it is testable because you can do it at home.

Independent variable is vinegar.

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Fill in the blanks;
qaws [65]

Answer:

Recombination Occurs During the Prolonged Prophase of Meiosis I.

Explanation:

hope it helps

good day

3 0
2 years ago
In an experiment, the membrane potential of a neuron is hyperpolarized to –120 mV. When an inhibitory neurotransmitter is applie
denis-greek [22]

Answer:

The inhibitory transmitter activates ligand-gated potassium channels

Explanation:

When a cell is in hyperpolarized state,the potassium gated channels are taken longer time to close up, Therefore, more K+ leaks out of the axoplasm  to the exterior.Therefore the cell appears to continue in the resting state, with more negative value of the cell potential of (-120 mV) and this called hyperpolarization.

However, with the addition of  inhibitory transmitter,the ligand-gated potassium channels are activated,Theses channels closes up.Then sodium  gated channels, which  were initially in refractive state reopens, sodium ions diffuses inwards for depolarization, and the neuron returns to depolarized state.

3 0
3 years ago
Select the phrases that accurately describe properties of the most common form of the DNA double helix. There is more than one c
icang [17]
You did not included your list of selections.  Some general properties ascribed to DNA are storage and expression of information and variables through mutations.  Replication, Transcription, Translation and Mutagenesis are the major functions of DNA in a cell.  DNA nucleotides contain deoxyribose.  DNA is double-stranded in the conservative mode, the original double Helix remains a complete unit and the new DNA double Helix is produced as a single unit.  In the double=stranded DNA, Hydrogen bonds hold one complimentary strand to the other.  

Hope this helps, I love Science.
8 0
3 years ago
Hi! guys help me please?​
rusak2 [61]

Answer:

Nervous system: This systems helps the five sense organs (eyes, ears, nose, tongue, skin) which all contain nerves that send messages to the brain about what is happening. The brain produces a response which it sends via other nerves to the muscles.

Digestive system: This system helps to break down food into simpler substances so it can be used and absorbed into the body. It takes place in the alimentary canal (food tube), mainly in the stomach and small intestine. The digested food is absorbed into the blood.

Respiratory System: This system helps take in oxygen and removing waste carbon dioxide. Air enters the lungs by movement of the rib muscles and diaphragm. The oxygen is absorbed into the blood.

Reproductive system: This helps produce offspring. Eggs are produces by ovaries in a female and the sperm is produced in the testes of a male. They then try and fertilise the eggs.

Note:

Hope this helped <33

3 0
2 years ago
tropical rain forests cover a small part of the planet yet they contain more species of plants and animals than all other biomes
liberstina [14]

True. if it is a true/false question the answer is True.

4 0
3 years ago
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