Wings of birds and butterflies have similar functions, but different evolutionary origins. They are:

A. physiological structures.
B. homologous structures.
C. analogous structures.
D. phylogenetic structures.


C

Biology & Microbiology

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T cell independent antigens lead to a memory response

Indicate whether this statement is true or false.

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Solar tracking is similar to _____

a. phototropism c. photoperiodism b. gravitropism d. thigmotropism

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Seeds contain all of the following EXCEPT

A. stored food. B. sufficient water for germination. C. an embryo sporophyte. D. a seed coat.

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Which structure can still develop normally in an embryo with mutations in both the SHOOTMERISTEMLESS (stm) gene and the HOBBIT gene?

A. shoot apical meristem B. cotyledons C. leaf primordia D. root apical meristem E. root cap

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