A Reproductive Difference Between Sea Urchins and Humans Is That

question 98

Multiple Choice

A reproductive difference between sea urchins and humans is that

• A)the sea urchin egg completes meiosis prior to fertilization,but meiosis in humans is completed after fertilization.
• B)sea urchin eggs are produced by meiosis,but human eggs are produced by mitosis.
• C)sea urchin eggs and sperm are of equal size,but human eggs are much bigger than human sperm.
• D)sea urchins,but not humans,have a need to block polyspermy because only in sea urchins can there be more than one source of sperm to fertilize the eggs.
• E)sea urchin zygotes get their mitochondria from the sperm,but human zygotes get their mitochondria from the egg.

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Definitions:

ADHD

Attention Deficit Hyperactivity Disorder, a neurodevelopmental disorder characterized by excessive inattentiveness, hyperactivity, and impulsivity.

Angular Gyrus

A region of the brain located in the parietal lobe, involved in a variety of processes such as language, number processing, and spatial cognition.

Dyslexia

A reading disability defined by challenges in recognizing phonetic sounds and understanding their association with letters and words, leading to reading difficulties.

Phonological Processing

The use of the sound structure of language to process written and spoken language, important for reading development and language skills.