Embryo

A)a long, tubular organ, like a tongue, used for sucking
B)a reproductive cell, such as an unfertilized egg
C)to add pollen to the female organ of a flower
D)an unborn, developing plant or animal
E)not sexual

D) an unborn, developing plant or animal

Gamete

A)a long, tubular organ, like a tongue, used for sucking
B)not sexual
C)to add pollen to the female organ of a flower
D)a reproductive cell, such as an unfertilized egg
E)an unborn, developing plant or animal

D) a reproductive cell, such as an unfertilized egg

The correct answer is D) An unborn, developing plant or animal

To arrive at this answer, we can break down the word "embryo" and its various meanings:

Option A) A long, tubular organ, like a tongue, used for sucking: This description matches the definition of a "proboscis" or a "sucker." It does not align with the term "embryo."

Option B) A reproductive cell, such as an unfertilized egg: This option refers to a different concept known as a "gamete" rather than an "embryo."

Option C) To add pollen to the female organ of a flower: This action is called "pollination," and it relates to a process involving plant reproduction, which is distinct from an "embryo."

Option D) An unborn, developing plant or animal: This definition accurately describes an "embryo," as it refers to the early stages of development of a plant or animal before birth or hatching.

Option E) Not sexual: While "embryo" does not convey sexual connotations, this option does not capture the essence of what an "embryo" truly is.

By analyzing the given options and their meanings, we can determine that option D) is the correct answer, representing an unborn, developing plant or animal.