The Segregation of Cytoplasmic Determinants to Certain Regions Within the Sea

question 48

Multiple Choice

The segregation of cytoplasmic determinants to certain regions within the sea urchin egg cytoplasm is aided in part by

• A) induction by cells surrounding the ovulated egg.
• B) gene expression in the egg immediately prior to fusion of the egg and sperm.
• C) gene expression within the zygote.
• D) microfilaments having a growing (plus)end.
• E) transport of yolk to the animal half of the egg.

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Definitions:

Altruistic

Behavior of an individual that benefits others at its own expense, often seen in social species as a way to enhance group survival.

Fitness Cost

Represents the negative repercussions on an organism's genetic contribution to future generations that can result from the expression of a particular phenotype.

Parental Behavior

Actions taken by parents to ensure the survival and well-being of their offspring, including feeding, protection, and teaching of necessary skills or behaviors.

Hymenoptera

An order of insects that includes wasps, bees, and ants, characterized by their distinctive two pairs of wings and social or solitary lifestyles.