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Andreyy89
3 years ago
9

What is dopamine? What role does it play in the brain

Biology
1 answer:
ozzi3 years ago
8 0
Dopamine is a neurotransmitter and it is responsible for transmitting signals between the nervous cells of the brain.
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A cell with 80 chromosomes undergoes mitosis. How many chromosomes are found in the daughter cells? How many daughter cells are
Natalka [10]

Answer:

1. 80 chromosomes are found in each of the daughter cells. 2. Two daughter cells are produced. 3. The daughter cells are identical to each other.

Explanation:

Mitosis is simply a process of cell division whereby two daughter cells that are genetically identical are produced from a single parent cell. A cell having 80 chromosomes would undergo Mitosis through these various stages:

Interphase: This can be referred to as the rest phase between cell division when mature enough for reproduction. This is a preparatory stage where DNA is duplicated and ready for the division of chromosomes

Prophase: This stage marks the beginning mitosis of the cell with 80 chromosomes. The chromatin threads start a coiling process in which the chromosomes become condensed to enable easy distribution to daughter cells without tangling.  

Prometaphase: This phase commences toward the end of the prophase, where the nuclear envelop breaks down. The chromosomes move toward to the center of the cell.

Metaphase: At this stage, the duplicated chromosomes line up on the mid plane or equator of the cell. During this stage, each chromatid is condensed completely and appears thick and distinct.

Anaphase: At this stage, the chromosomes move toward the poles as each replicated copies of the DNA of the cell ends up on either side of the cell. What we would have here at this stage is an entirely two new sister chromatid having 80 chromosomes. Cytokinesis begins towards the end of this stage as the parent cell cytoplasm divides which also continues at telophase.

Telophase: This is the final phase of Mitosis where two separate nuclei are formed and Cytokinesis takes place to complete the division of the cell to form two daughter cells having the same number of chromosomes. These cells are genetically identical to the original parent cell.

5 0
3 years ago
20 POINTS!!!What describes the diet of a saprotroph?
Katena32 [7]

Answer:

Dead plant matter

Explanation:

Saprotrophs feed by a process known as absorptive nutrition, in which the nutritional substrate (e.g., dead organism or other nonliving organic matter) is directly digested by a variety of enzymes that are excreted by the saprotroph.

4 0
2 years ago
Write a journal about Jamestown by describing the dangers, the mistakes they did and lastly the hardships? If u do this I will g
Vera_Pavlovna [14]

Answer:

2c. Jamestown Settlement and the "Starving Time"

Explanation:

The first joint-stock company to launch a lasting venture to the New World was the VIRGINIA COMPANY OF LONDON. The investors had one goal in mind: gold. They hoped to repeat the success of Spaniards who found gold in South America.

In 1607, 144 English men and boys established the JAMESTOWN colony, named after King James I.

The colonists were told that if they did not generate any wealth, financial support for their efforts would end. Many of the men spent their days vainly searching for gold.

As a consequence, the colonists spent little time farming. Food supplies dwindled. MALARIA and the harsh winter besieged the colonists, as well. After the first year, only 38 of the original 144 had survived.

PLZ MARK BRAINLIEST

5 0
3 years ago
Please help me and hurry
miskamm [114]

Answer:

5

Explanation:

-5 0 5 10

---------------------------------------------------------

start at 0, move right 3, so ur at 3. then move left 4, so its -1. Then 6 to the right so its 5.

0+3=3-4=-1+6=5

8 0
3 years ago
What type of mutation causes cystic fibrosis?
Nuetrik [128]
Cystic Fibrosis is a genetic mutation
4 0
3 years ago
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