The burning of fossil fuels by cars and factories has most affected the ______________ cycle.

Biology

2 answers:

trasher [3.6K]4 years ago

6 0

I Think Its The Carbon Cycle

Crank4 years ago

6 0

Answer:

The correct answer would be the carbon cycle.

Carbon cycle refers to the biogeochemical cycle by which carbon is cycled in an environment via various inter-conversions of carbon compounds.

The burning of fossil fuels by cars and factories release a huge amount of carbon dioxide in the atmosphere.

It is then used by plants for the process of photosynthesis.

Plants products are then consumed by consumers which then release carbon dioxide back into the atmosphere through cellular respiration.

Thus, burning of fossil fuels would affect carbon cycle the most.

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I 4. Genetic Equilibrium...explain it.

sveticcg [70]

Answer: Genetic equilibrium is a situation where allele frequencies in a gene pool are not changing. In other words, the population is not evolving. The conditions to maintain the genetic equilibrium are no mutation, no gene flow, large population size, random mating, and no natural selection. The equilibrium can be disrupted by deviations from any of its five main underlying conditions.

An example of this in humans would be a heterozygote for brown eye color. The person would carry both a dominant brown allele “A” and a recessive blue allele “a” yet have brown eyes. The dominant brown allele masks the recessive blue allele. Genetic equilibrium is the state in which allele frequencies remain constant.

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3 years ago

Q1 What is the correct sequence an impulse travels through the four components of the heart’s nodal system?

Likurg_2 [28]

Answer:

1. The correct sequence in which an impulse travels through the heart’s nodal system is SA node, AV node, bundle of HIS and Purkinje fibers (B-C-A-D)

2. The structure that depolarizes next after the AV node is bundle of HIS.

3. Soon after the onset of ventricular systole the semilunar valves open.

Explanation:

1. The conduction system of the heart -nodal system- is what allows myocardial contraction, which translates into heartbeat and pumping of blood.

This conduction system begins in the sino-atrial node (SA), which is located in the upper portion of the right atrium, and is regulated by the autonomic-sympathetic and parasympathetic nervous system.
The impulse generated in SA passes to the atrioventricular node (AV) that is located in the interventricular septum (IVS).
From AV, impulse passes to the His-Purkinje system, formed by the bundle of His, which runs along the IVS and is divided into two branches, right and left.
Purkinje fibers are born from each of the bundles of His bundle, and are distributed through the right and left ventricles.

2. As a result of the depolarization that occurs in the atrioventricular node - which undergoes a brief interruption in its path - depolarization continues in the bundle of His, which runs through the rest of the interventricular septum to divide into two branches, the right and the left.

The left branch is usually subdivided into three fascicles, the left anterior, left posterior and a central branch. Purkinje fibers are born from each of these branches and fascicles, which stimulate myocardial contraction.

3. Ventricular systole consists of contraction of the myocardium, which leads to boost blood contained in the ventricles to the lungs or general circulation. In this phase of the cardiac cycle, the semilunar valves - which allow access to the pulmonary and aortic arteries - open, which produces the second cardiac noise.

Other events that occur during systole are the increase in ventricular pressure and the closure of the atrioventricular valves (AV), to prevent ventricular blood from returning to the atria.

Learn more:

Event that occurs during systole brainly.com/question/4552813