Which of the Following Can Have Long, Movable Spines

question 38

Multiple Choice

Which of the following can have long, movable spines?

• A)class Crinoidea (sea lilies and feather stars)
• B)class Asteroidea (sea stars)
• C)class Ophiuroidea (brittle stars)
• D)class Echinoidea (sea urchins and sand dollars)
• E)class Holothuroidea (sea cucumbers)

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Definitions:

Recessive Trait

A genetic trait that is expressed only when two copies of the recessive allele are present, being masked by dominant alleles when in heterozygous form.

Karyotype

The number, size, and shape of chromosomes in an organism’s cell, serving as a tool for chromosome analysis and genetic diagnosis.

Genetic Diseases

Disorders caused by abnormalities in an individual's DNA, often resulting in various health issues and conditions.

X-Linked Recessive Disorders

Genetic conditions caused by mutations in genes on the X chromosome, usually manifesting in males who have only one X chromosome, and are less affected in females who have two X chromosomes.