In __________, one of the sperm cells in the pollen

tube fertilizes the egg, forming a zygote; the other
fuses with the endosperm mother cell and gives rise
to __________. Fill in the blank(s) with the appropriate word(s).


Answer: double fertilization; endosperm

Biology & Microbiology

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Double fertilization is:

A. fertilization of two eggs in the same flower B. fertilization of an egg by two sperm C. fertilization of an egg by one sperm and of the nucleus of an endosperm-forming cell by another sperm D. fertilization of two eggs by the same sperm E. fertilization of an egg and an endosperm-forming cell by the same sperm

Biology & Microbiology

Which enzyme assembles new strands of DNA during replication?

a. DNA ligase b. DNA synthase c. primers d. DNA polymerase e. hybridization

Biology & Microbiology

Regions of a specimen with higher electron density scatter ________ electrons and, therefore, appear ________ in the image projected onto the screen of a transmission electron microscope.

A. fewer; lighter B. more; lighter C. fewer; darker D. more; darker

Biology & Microbiology

Describe the form and function of slow-twitch muscles

What will be an ideal response?

Biology & Microbiology