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Mice21 [21]
4 years ago
11

Which are characteristics of medusae?

Biology
1 answer:
Dmitrij [34]4 years ago
6 0
Snake hair face of women body of a creature
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Which current is produced inresponse to a hyperpolarizing stimulus in a giant axon of a squid?
bekas [8.4K]

The giant axon of a squid, shows that hyperpolarizing stimulus is followed by transient inward capacitive current and lasting outward capacitive current.

Hyperpolarization is a change in a cell's membrane potential that makes it more negative. It is the opposite of a depolarization. It inhibits action potentials by increasing the stimulus required to move the membrane potential to the action potential threshold.

Hyperpolarization can be caused, for instance, by opening channels that allow positive ions to move out of the cell (or negative ions to move in).

The hyperpolarization-activated current is an inward current activated by hyperpolarization from the resting potential and is an important modulator of action potential firing frequency in many excitable cells.

To learn more about hyperpolarization here

brainly.com/question/27181895

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6 0
2 years ago
The brain-neuroendocrine process that occurs primarily in early adolescence and involves rapid physical changes in height, weigh
Gemiola [76]

Answer:

puberty

Explanation:

Puberty. The answer is puberty

7 0
1 year ago
According to the diagram, how would the earth, moon, and sun be arranged if the low tide is at its lowest for the month?
zhenek [66]

Answer:

C

Explanation:

8 0
3 years ago
The PCR (polymerase chain reaction) protocol that is currently used in laboratories was facilitated by the discovery of a bacter
VLD [36.1K]

Answer and Explanation:

a. Why would such a heat-stable polymerase be beneficial in PCR?

- Because in PCR, DNA is heated up 95 °C to denature DNA (see first figure)

b. What would happen if it weren’t heat stable?

- If it weren't heat stable we had to add it in every PCR cycle and please note that PCR can take 20 to 35 cycles. Imagine being researcher that you need to open 20 small tubes every 5 minutes and add polymerase enzyme into these tubes for 20 to 35 times. It is very labor intensive and Taq polymerase relives the researchers from this work.

c. How might you choose a region of DNA for a PCR primer so as to increase the temperature necessary for primer annealing (to minimize nonspecific PCR products)?

- You need to calculate melting temperature (Tm) of your primers and use the calculated values to prevent non specific bindings. Primers usually binds non-specifically if the low annealing  temperature is used (lower than 5 °C of your Tm value)

d. A PCR reaction begins with 5 double stranded segment of DNA. Estimate the number of double-stranded copies of DNA that are present after the completion of 15 amplification cycles?

In every amplification cycle copies of DNA are doubled. So the answer is 5 x 2^15.

3 0
4 years ago
Many organic molecules are made up of repeating units of individual molecules called
-Dominant- [34]
The answer is monomers
8 0
4 years ago
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