When Appropriately Prompted,diploid Individuals of Ulva Prolifera Form Spores That

question 34

Multiple Choice

When appropriately prompted,diploid individuals of Ulva prolifera form spores that germinate to become haploid individuals.What is the most likely mechanism by which diploid individuals could be created to complete the life cycle?

• A) Haploid individuals meiotically produce egg cells and sperm cells, which subsequently fuse.
• B) Some haploid individuals undergo multiple rounds of mitosis without cytokinesis, followed by nuclear fusion.
• C) Some of these individuals differentiate to become haploid gametes and then fuse to produce a diploid zygote.
• D) Haploid individuals undergo two sequential S phases in their cell cycle to reestablish the diploid state.

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Definitions:

Norepinephrine

A neurotransmitter and hormone involved in the body's "fight or flight" response, regulating heart rate, blood pressure, and sugar levels.

Agonist

A chemical or drug that binds to receptors in the brain and causes a reaction or response similar to a naturally occurring substance.

Absolute Refractory Period

a period immediately following the transmission of a nerve impulse when a neuron is not responsive to stimulation from another impulse.

Neurotransmitters

Chemical substances that transmit signals from one neuron to another across synapses.