Leap Years- Years That Contain an Extra Day-Are Necessary Because

question 161

Multiple Choice

Leap years- years that contain an extra day-are necessary because

• A) Earth's speed of revolution along its elliptical orbit varies throughout the year.
• B) 365 days is not exactly divisible by four.
• C) the rotation rate of Earth varies, leading to days of different length during the year.
• D) the length of a year is not an exact number of days.

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Definitions:

Hemidesmosomes

Specialized cell structures that anchor epithelial cells to the underlying basement membrane.

Fibroblast

A fibroblast is a type of cell found in connective tissue, responsible for producing collagen and other fibers that contribute to the structural framework of tissues.

Connective Tissue

A type of body tissue that supports, connects, or separates different types of tissues and organs in the body, characterized by diverse functions and appearances.

Protein Fibers

Long chains of amino acids that form structures like collagen and keratin, providing support and strength to tissues and cells.