Answer:
A. A water molecule passes through a semi permeable membrane
Explanation:
Facilitated diffusion is the diffusion of a molecule without any assistance from a protein or protein channel.
In facilitated diffusion, a molecule will diffuse by itself through a semi permeable membrane, such as the cell membrane.
Answer choices B, C, and D are incorrect because they are all examples of facilitated diffusion. The molecules required assistance from a protein.
Answer choice A is correct because the water molecule was able to pass through by itself.
So, the correct answer is A. A water molecule passes through a semi permeable membrane
Answer:
The disease that instructor list with a primary characteristic of erythrocytosis "Polycythemia Vera."
Explanation:
Polycythemia vera is a kind of plasma cancer. It reasons your bone marrow to kind too many red blood cells. These extra cells condense your blood, decelerating its flow, which may reason serious difficulties, such as blood clots. It is a stem cell complaint considered as a panhyperplastic, malignant, and neoplastic core ailment. Its most protruding feature is an raised absolute red blood cell mass since of unrestrained red blood cell manufacture.
Answer:
B. Gene expression is influenced by high lactose levels in the environment.
Explanation:
The lactose operon (lac operon) functions for the metabolism and transport of lactose in several bacteria.
Gene expression is influenced by high lactose levels in the environment as genes are expressed in the presence of high level lactose and absence of glucose. High level lactose carry an activator protein called catabolite activator protein (CAP), which let the RNA polymerase do transcription of the operon.
Hence, the correct option is "B".
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The best and most correct answer among the choices provided by your question is the second choice or letter B.
Crossing over occurs during meiosis when chromosomes overlap and sections of each chromosome switch places in prophase II.
