What is land use? (1 point)

Which of these hypothetical scenarios are examples of pleiotropy?

Answer:

The correct answers are A and B.

Explanation:

Pleiotropy is defined as "when a single gene affects two or more phenotypic characteristic of an organism.". Phenotypic refers to the traits that can be physically observed or measured in an organism, for example height, hair color etc. So the examples of pleiotropy in the given options are in A and B which describe situations where one gene affects two or more phenotypic traits.

I hope this answer helps.

7 0

3 years ago

Reactive oxygen species (ROS) are unstable, or reactive, compounds that result from the partial reduction of oxygen. ROS can cau

Genrish500 [490]

Answer: .OH, O2-, H2O2

Explanation:

Reactive oxygen species (ROS) are chemically reactive and unstable species containing oxygen. ROS are formed when oxygen is partially reduced, thus they are all radicals with very high reactivity, attacking membrane proteins such as ion channels etc

Examples include peroxides (H2O2), superoxide (O2-), hydroxyl radical (.OH)

6 0

2 years ago

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An inherited disease is due to a mutation that may have occurred in previous generations. Yet we do not inherit all the mutation

attashe74 [19]

Answer:

It depends on what genes has passed down the generations.

8 0

2 years ago

What structure in euglena indicate that they can carry out photosynthesis

777dan777 [17]

Chloroplast contains the chlorophyll necessary for photosynthesis

8 0

3 years ago

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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

3 0

3 years ago