BIOLOGY HIGH SCHOOL

The plentiful nature of resources in the tropical rainforest reduces competition for them.

Answers

Answer 1
Answer: That statement is false

The plants still have to undergo a fierce competition in order to obtain sunlight. The taller trees will obtain more sunlight while overshadowing the smaller one.

Meanwhile , even though there are a lot of food resources in the rain forest, it also have many animals that compete for the same food.
Answer 2
Answer:

Answer: The plentiful nature of resources in the tropical rain forest reduces competition for them is  FALSE

The plants still have to go through an aggressive competition in order to obtain sunlight. The trees which have a high altitudes  will get more sunlight whereas overshadowing the ones with smaller altitudes . There is a lot of food that can be obtained in the forest but at the same time many animals are present in the forest too as a result even for the food the animals would have to compete.


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A characteristic of acids is that they react with metals to: form non-metals release water release hydrogen gas produce bases

Answers

Answer:  

When an acid reacts with a metal it results in the formation of salt and hydrogen gas is liberated. For example, the nitric acid reacts with the calcium it forms salts of calcium nitrate and hydrogen gas is liberated.

  a characteristic of acids is that they react with metals to release hydrogen gas.

The cell cycle consists of two main phases: _____. interphase and M phase G0 phase and S phase M phase and S phase interphase and G2 phase

Answers

Answer: The correct answer is -

interphase and M phase.

Explanation:

Cell cycle can be described as a series of events that take place for the division of cell into two daughter cells.

It is primarily divided into two stages, which are-

1) Interphase (that is further divided into G1, S, and G2 phase) that involves the duplication of DNA and other proteins required in cell division.

2) M (mitotic phase) phase during which the nuclear division takes place through four successive stages that are prophase, followed by metaphase, anaphase and telophase.

After this cytokinesis (cytoplasmic division) occurs resulting in formation of two daughter cells.

Thus, first option is the right answer.

Interphase and M phase (Mitotic phase).

Interphase is when the cell is resting and preparing for division, M phase is when the cell is in the process of dividing.

In 1859, Charles Darwin described a model of how living things change over time. He described this model and the evidence that supported it in a book called On The Origin of Species. Which scientific term is used to describe a testable model that seeks to explain natural phenomena?

Answers

The natural selection process ensures that the weak members or traits of organisms are removed so that only the strong will remain. This ensures that the organisms and their descendants will live for as long as possible. This is the process by which organisms evolve to allow for higher survival rates. For example, an animal that is covered by thick and multiple layers of fur is made for the extremely cold climates. However, if the world begins to get warmer and warmer, such animals and their offspring will begin to have thinner and thinner layers of fur. This will allow their specie to survive longer. 

Answer:

D. Theory

Explanation:

A 68-year-old woman who presents after a fall reports progressive difficulty climbing stairs for the past 3 months. She also feels a loss balance when rising from a chair. She has a 5-year history of diabetes mellitus for which she takes metformin. Examination demonstrates intact cranial nerve function; normal sensory examination except for mildly decreased touch and vibration in her toes, normal motor function except for 4+/5 deltoid power and 4+/5 hip power bilaterally, and an inability to stand on her toes. Deep tendon reflexes are 2+ but 1+ at the ankles; plantar responses are flexor; cerebellar function is normal except for mild difficulty with heel-knee-shin testing. She has difficulty rising from a chair without pushing up with her hands. These clinical findings are best explained by dysfunction in which of the following regions of the nervous system?A. anterior horn cellB. muscleC. nerve plexusD. peripheral nerveE. spinal cord

Answers

Answer:

spinal cord and nerve plexus

Explanation:

Faced with this clinical picture, we would be talking about the affection of the spinal cord and the peripheral nerves that sensually perceive the areas of the epithelium, that is, they give the sense of touch, since the patient is diabetic, it could be deduced that the microangiopathies that this generates Chronic disease over time, can affect the irrigation of certain areas and therefore their inventions, due to lack of supply of oxygen and nutrients.

Diabetics are at risk of affecting both upper and lower limbs, because over time they lose the vascularization and winterization of these areas, thus generating infections or pain imperceptible by the patient.

On the other hand then, it would be ideal to say that the spinal cord with the peripheral nerves that innervate the affected areas, and the cerebellum are affected by the lack of balance or spatial disposition of the patient in relation to their body size.

Human Genome researchers discovered transposons. What are these structures?

Answers

Answer:

Transposon is a fragment or sequence of DNA that can move unregulated to any point in the cell genome, leading to a phenomenon called transposition.

Explanation:

Transposon is the name of what was previously known as jumping genes, being a DNA sequence capable of moving freely within a DNA molecule. A transposon can produce mutations by translocation, altering the total amount of nucleotide in DNA molecule.

Genetic changes that are linked to evolutionary processes can be due to the existence of transposons, since they can even induce chromosomal changes.

What is the hydrologic cycle

Answers

The hydrologic cycle is the flow of water from the Earth's surface via evapotranspiration to the atmosphere, where it condenses, and back to Earth in the form of precipitation. This cycle is important to the circle of life.
The water cycle or hydrologic is a continuous cyclewhere water evaporates, travels into the air and becomes part of a cloud, falls down to earth as precipitation, and then evaporates again. This repeats again and again in a never-ending cycle.
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