Answer:
If a geneticist is studying the visible expression of allele combinations in an organism, such as its height, hair color, and eye color, they are studying the organism's phenotype. Therefore, the correct answer is b) Phenotype.
I believe the correct answer is FALSE.
The heart is an organ located at the center of the chest in the thoracic cavity and functions to supply blood to and from tissues giving the tissues oxygen and nutrients while taking away carbon dioxide and waste products. It is divided into 4 chambers and 2 chambers are separated by a muscular wall that prevents mixing of the blood.
Blood enters the heart via the vena cava which is divided into the superior vena cava that recieves blood from the upper region of the body that includes the head, neck and chest while the inferior vena cava recieves blood from the lower extremeties that includes the legs, the abdomen, the pelvic region and the thighs. The blood is deposited into the right atrium and is de-oxygenated. When it is deposited into the right atrium, the change in volume of the atrium and the expansion causes the valve to open and allow the de-oxygenated blood to flow into the right ventricle. The right ventricle then pumps the blood that is de-oxygenated to the lungs via the pulmonary artery which is the only artery that pumps de-oxygenated blood. In the lungs, carbon dioxide is removed and oxygen added to the blood and is taken to the left atrium which pumps the oxygenated blood to the left ventricle and then the left ventricle pumps the oxygenated blood to the rest of the body. The blood is then again taken through the body via the capillaries and the veins pick up the blood that has been removed of oxygen and added with carbon dioxide and transport the blood back to the heart via the vena cava. It enters the right atrium via both the inferior and superior vena cava and the de-oxygenated blood is circulated again to the lungs for oxygenation from the left ventricle.
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Level: High School
Subject: Biology
Topic: The Circulatory System
The statement “the right ventricle transports oxygenated blood to lungs” is false.
Further Explanation:
Heart of humans have four chamber namely right and left atrium also, right and left ventricle. The main purpose of heart is to pump blood throughout the body. Due to this constant beating of heart a pressure is maintained in the body which helps in the flow of the blood.
The heart receives the deoxygenated blood from the body parts. This blood reaches the right atrium by means of superior and inferior vena cava. The blood from right atrium is pushed to the right ventricle. So, the right ventricle always has deoxygenated blood. This blood is then pushed to the lungs by the means of pulmonary artery into the lungs.
This blood then gets oxygenated by the means of fusion through capillaries and returns back to the heart specifically, to the left side. This blood is then pumped to the organ systems where it provides the tissues with oxygen.
Important note-
a. The right side of the heart always has deoxygenated blood.
b. The left side of the heart has oxygenated blood.
Therefore, the statement that the right ventricle of the heart has oxygenated blood is not true.
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Answer Details:
Grade: Middle School
Subject: Biology
Chapter: Human Physiology
Keywords:
Heart, ventricle, atrium, right atrium, left atrium, right ventricle, left ventricle, oxygenated blood, deoxygenated blood, pulmonary artery, SA node, lungs, oxygenation of blood.
Some viruses consist only of a protein coat surrounding a nucleic acid core. If you wanted to radioactively label the nucleic acids separately from the protein, you would use radioactive nucleotides.
To selectively label the nucleic acids separate from the protein in viruses, radioactive nucleotides are utilized. These radioactive nucleotides contain a radioactive isotope and can be incorporated into the viral nucleic acids during processes like replication or synthesis. This incorporation enables the specific labeling of the genetic material while leaving the protein coat unlabeled.
Researchers use this technique to trace and investigate the behavior and interactions of nucleic acids, providing insights into viral replication, gene expression, and various molecular processes. Radioactively labeled nucleotides, such as tritiated thymidine (3H-thymidine) or 32P-labeled phosphate groups, have been instrumental in advancing our understanding of nucleic acid biology and have applications in fields ranging from virology to molecular genetics.
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Answer: Phosphorous
Explanation:
Phosphorous can be used to label Nucleic acid. Nucleic acids can be modified or labelled using tags .
Some common materials or substances that can be used to label nucleic acids are flurophore, enzymes, radioactive phosphorous, biotin et cetera.
The nucleic acid of virus is labelled using phosphorous. When this virus will infect the host cell then nucleic acids will be seen separately.
B.They evolved after the seeded flowering plants.
C.They evolved after the seedless vascular plants.
D.They evolved before the seedless nonvascular plants.
The statement that best explains the evolution of gymnosperm plants is that they evolved after the seedless vascular plants.
Gymnosperms are classes of plants that do not produce fruits but rather bear seeds structures called cones.
Gymnosperms and angiosperms both belong to the class of plants called higher plants because they have mechanisms for conducting and transporting water and nutrients.
Gymnosperms are believed to evolve before angiosperms or flowering plants but after seedless vascular plants called pteridophytes.
Therefore, the statement that best explains the evolution of gymnosperm plants is that they evolved after the seedless vascular plants.
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Following are the choices:
a. nonrenewable energy sources b. renewable energy sources
c. carbon sequestration d. recycled plastics
The correct answer is:
b. renewable energy sources
Explanation:
Renewable energy is energy that is obtained from renewable resources, which are naturally provided on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy compares to the provision of energy via renewable sources which are simply replaced fast enough as being used.
Answer:
relative and absolute dating
Explanation:
Two methods of dating fossil fuels are -
a) Relative Dating and b) Absolute Dating
a) Relative Dating - In this method, unknown age of fossil A is determined by comparing it with the known age of fossil B via correlation . Such " fossils B" are known as index fossils. These index fossils belong to a specific age group.
Some common example of index fossils are -
brachiopods,
trilobites, and
ammonites
b) Absolute Dating - In this method, the age of rock is determined through radiometric dating methods. Here, instead of dating the fossil itself, the rock or volcano layer above and below the fossil is dated for determining a rage of date.