All categories

2 years ago

What are three characteristics that make life possible on Earth?

1 answer:

8 0

Different characteristics such as Earth's atmosphere, distance from the Sun, and presence of water make life on Earth possible.

<h3>Is there a groups of rules for organisms to live?</h3>

The idea that there is a group of rules to support life on Earth is controversial but it is clear that life as we know required different features to form.

Some of the most important features that support the emergence of biologically closed systems on Earth include the presence of water in a liquid state, an appropriate atmosphere and a suitable amount of solar radiation.

In conclusion, different characteristics such as Earth's atmosphere, distance from the Sun, and presence of water make life on Earth possible.

Learn more about life on Earth here:

brainly.com/question/23140994

#SPJ1

You might be interested in

Why is it that steroid hormones use receptors inside of target cells, whereas protein, peptide, and amino acid hormones do not?

Montano1993 [528]

<span>Steroids can cross the cell membrane because they are lipids and the membrane is lipid</span>

6 0

3 years ago

There is a new trend to focus on dopamine receptor sensitivity rather than on dopamine itself because

Alex

Answer:

There is no scientific evidence to prove that people with schizophrenia ingest dopamine capable of accumulating excess in the body.

Explanation:

Although you did not specify that your question is associated with the origin of schizophrenia in people, we can see that this is the main topic of your question, due to its context. This is because scientists have been striving to find the origin of this disease, in order to be able to combat it in the early stages. Although many scientists believe that the origin of this disease is associated with excessive intake of dopamine, there is not strong enough scientific evidence to show that this is true. Because of this lack of evidence, filmmakers have focused on associating the origin of the disease with the sensitivity of the dopamine receptor and not with the dopain itself.

5 0

3 years ago

Glycogen reserves can release glucose for cellular respiration. glycogen reserves are typically found in?

avanturin [10]

Glycogen reserves can release glucose for cellular respiration. glycogen reserves are typically found in the muscles and liver.

The liver and muscles contain the body's "quick" source of energy, known as glycogen stores.
They go through further metabolism after being converted to glucose.
After that, glucose can be further digested to release energy both aerobically and anaerobically.

<h3>Glycogen reserves: what are they?</h3>

When the body doesn't need to consume the glucose for energy, the liver and muscles store it.
This kind of stored glucose, which is made up of many connected glucose molecules, is known as glycogen.

<h3>How long are glycogen reserves good for?</h3>

Utilizing the form, you can learn more about nutrition and glycogen.
But it's helpful to know that once glycogen stores are exhausted, it will take at least 48 hours to fully refill them.
This necessitates rest throughout the recovery period and a high-carbohydrate diet (60–70% of the energy must come from carbohydrates).

To learn more about glycogen reserves visit:

brainly.com/question/11478490

#SPJ4

6 0

1 year ago

When does the total number of chromosomes get reduced from 46 pairs to 23 individual chromosomes? View Available Hint(s) When do

ivann1987 [24]

Answer:

23 pairs of chromosomes (46 individual chromosomes) are redued to 23 individual chromosomes in meiosis I.

During Meiosis I

Explanation:

Meiosis is a type of cell division that results in four daughter cells with each having half the number of chromosomes as in the parent cell. During meiosis, cell division occurs twice because before the two halves of a duplicated chromosome (sister chromatids) is separated, it still needs to separate homologous pair of chromosomes, which is a similar but non-identical pair of chromosomes received from both parent. Hence, meiosis occurs in a two step division process; Meiosis I and Meiosis II.

Note that, a diploid cell contains 23 pairs of chromosomes ( 46 chromosomes in total). Each pair of chromosome is from the haploid gamete produced by each parent after meiosis.

Before going into meiosis I, the cell must first undergo growth and replicate its DNA in the interphase stage just like in mitosis. In the Prophase I of meiosis I, chromosomes condense as in mitosis but also pair up. Each chromosome aligns with its homologue pair to form a structure called TETRAD or BIVALENT.

Homologous pairs, not individual chromosomes (23 pairs in number) line up at the metaphase plate for separation during metaphase I.

In anaphase I, the homologues are pulled apart by the spindle fibres and move apart to opposite ends of the cell. The sister chromatids of each chromosome, however, remain attached to one another and don't come apart. Hence, the cell now has 23 chromosomes on one side of the cell, and another 23 on the other side.

After cytokinesis (division of the cytoplasm) in meiosis I, two daughter cells are produced and each now possesses 23 individual chromosomes (haploid) different from the parental 23 pairs (diploid).

N.B: Sister chromatids separate in the anaphase of meiosis II, where each chromatid is counted as an individual chromosome.

4 0

3 years ago

Parkinson disease is associated with demyelination of CNS neurons. a pyramidal nerve tract lesion. insufficient production of ac

Pepsi [2]

Answer:

The correct option is: <em>a deficiency of dopamine in the substantia nigra.</em>

Explanation:

The substantia nigra is the principal site involved in the physiopathology of Parkinson´s disease.

Cells from this area degenerate and die progressively causing important degeneration in the central nervous system. The cells that die -with no known reason- are those that produce dopamine and proportionate dopaminergic innervation to the encephalon. In fact, almost all the symptoms exhibited by patients with the disease can be explained by the lack of dopamine in the substantia nigra.

This area uses the neurotransmitter to communicate neurons from the base ganglia. Ganglia are responsible of modulating and modifying movements.

The nigrostriatal system participates in planning and automatic execution of learned movements. When the ganglia activity decreases, so it does the amount and velocity of movements, something typical of the disease.

3 0

3 years ago