Which of the following statements best defines an organelle?
Layer of polysaccharides outside the plasma membrane of cells
Abnormal Infectious proteins
Specialized structures within a cell
Collection of tissues used to serve a specific function
Correct Answer : C
Organelles are specialized structures within a cell that serve a specific function. For example, mitochondria supply energy to the cell by generating adenosine triphosphate. Ribosomes are the site for protein synthesis. The nucleus is in charge of all of the activities of the cell.
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Correct Answer is C
Explanation
A scientific argument should be based on measurable and observable facts such as the patient's current symptoms and health history. Discussing the patient's appearance or the doctor's feelings does not communicate a scientific argument. While insurance may be a factor in most healthcare systems, the status of the patient's Insurance does not communicate a scientific argument that justifies the need for the test
Correct Answer is B
Explanation
The gastrocnemius vein is found in the calf. The femoral vein is found in the proximal anterior thighs/pelvis.
Since the gastrocnemius vein is found below the femoral vein it is distal or inferior to the femoral vessel.
Correct Answer is C
Explanation
There are four different nucleotides in DNA. Nucleotides are monomers of nucleic acids, composed of five- carbon sugars, a phosphate group, and a nitrogenous base. Nucleotides make up both DNA and RNA. They are essential for the recording of an organism's genetic information, which guides the actions of the various cells of the body.
Correct Answer is C
Explanation
The best use of the International System of Units (SI) for this situation would be the use of the micrometer as it is the smallest unit of measurement provided and the scientist is using a microscope to view the insects.
Correct Answer is C
Explanation
The uterus has three layers. The inner layer is called the endometrium. The middle layer is called the myometrium. The outer layer of the uterus is called the serosa or perimetrium.
Correct Answer is D
Explanation
Endocytosis is a process by which cells absorb larger molecules or even tiny organisms, such as bacteria, that would not be able to pass through the plasma membrane. Endocytic vesicles containing molecules from the extracellular environment often undergo further processing once they enter the cell.
Correct Answer is A
Explanation
Two genes next to each other (or within a specified close distance) are said to be linked. Linked genes do not follow the law of Independent assortment because they are too close together to be segregated from each other in meiosis.
Correct Answer is D
Explanation
A hypothesis is the use of prior knowledge in order to provide a hypothetical explanation for why something may or may not occur. A hypothesis can be proved wrong or right based on the results of the experiment and repeated trials.
Correct Answer is C
Explanation
In general, atomic radius increases moving down a group due to the increasing number of electron shells. In general, atomic radius decreases moving from left to right across a period due to the increasing number of protons in the energy level. Therefore, atoms of elements in the bottom-left corner of the periodic table tend to have the largest atomic radii.
Correct Answer is B
Explanation
Correlations may be positive or negative and linear or nonlinear. However, correlation does not determine cause and effect. Correlation does not necessarily mean causation.
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