Which of the following lists the stages of embryonic development in the correct order
following fertilization?
a. zygote, morula, blastula, gastrula, embryo
b. morula, blastula, gastrula, zygote, embryo
c. gastrula, blastula, morula, embryo, zygote
d. embryo, blastula, gastrula, morula, zygote
A
You might also like to view...
Proteins may function as
a. structural units. b. hormones. c. storage molecules. d. transport molecules. e. all of these.
Keystone species
a) occur only in intertidal zones b) can be removed from a habitat without any impact on the remaining species in the habitat c) play an unusually important role in determining the species composition in a habitat d) are primary produces, and therefore, are usually plants e) are more expendable than commensal species, from a conservation perspective
_____ pigments protect many phototrophic organisms from photochemically produced singlet oxygen
Fill in the blank(s) with the appropriate word(s).
Mucus traps pathogens that are later coughed or sneezed away. What form of body defense applies to this example?
A) first line of defense
B) second line of defense
C) third line of defense
D) antibody-mediated immunity