Which of These Changes Occur in the Fetus at the Time

question 10

Multiple Choice

Which of these changes occur in the fetus at the time of birth?

• A)the lungs inflate
• B)increased resistance to blood flow through the lungs occurs
• C)the umbilical vein becomes the ductus venosus
• D)the umbilical arteries become the ligamentum arteriosum
• E)the foramen ovale becomes the round ligament

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Definitions:

Organelles

Specialized structures within a cell that perform specific functions, such as mitochondria and chloroplasts.

Mycorrhizae

Symbiotic relationships between the roots of plants and fungi, where the fungus assists in the absorption of water and nutrients from the soil in exchange for carbohydrates produced by the plant.

Mutualism

Mutualism describes a relationship between species in which both species benefit.

Frequency-Dependent Selection

A type of natural selection in which the suitability of a phenotype is determined by its relative frequency compared to other phenotypes within the population.