Magma that squeezes into a horizontal crack is called a Sill. Magma that squeezes into a vertical crack is called a Dike.
The place where the ancestral linage splits on a cladogram
The closest answer would be A. Fertilization takes place in the Fallopian tube which is close to the ovary.
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Answer: 6) sodium channel activation occurs.
4)a graded depolarization brings an area of excitable membrane to the threshold.
7) sodium ions enter the cell and further depolarization occurs.
1)sodium channels are inactivated.
2) voltage-regulated potassium channels open and potassium moves out of the cell, initiating repolarization.
3) sodium channels regain their normal properties.
5) a temporary hyperpolarization occurs
Explanation:
action potential occurs when the differences in the concentrations of ions on opposite sides of a cellular membrane lead to a voltage of a specific cell location rapidly rises and falls.
The steps involved in this generation are;
First of all the sodium-gated channel activation occurs due to inflow of Na, this is called depolarization. A graded depolarization brings an area of excitable membrane to the threshold. More sodium ions enter the cell and further depolarization occurs. After which the sodium channels are inactivated due to the opening of voltage-regulated potassium channels and potassium moves out of the cell, returning it to it initial resting phase initiating repolarization. sodium channels regain their normal properties. a temporary hyperpolarization occurs which is a transient negative shift after an action potential occurs.
Answer:
Two recently replicated DNA double helices joined before the mitosis is -Sister chromatids.
Explanation:
The similar replicated copies of chromosomes that are formed by DNA in an living organism is well known as ‘sister chromatids’. Both these copies are bound together by centromere that is common in both. These pair of chromatid is recognized as ‘dyad’.
Through the mitosis, these pairs are divided or separated. The cohesion of this chromatid is essential for an accurate genetic information distribution between repairing of damaged chromosomes and daughter cells.
