Which part of the life cycle does a pollen grain represent?
A) a spore
B) a sperm cell
C) a male gametophyte
D) a male sporophyte
Answer: C
You might also like to view...
Which of the following fish have a cranium but lack a backbone?
a. Hagfish b. Sting ray c. Lamprey d. Tuna e. Shark
Hemoglobin is a(n) -rich protein that carries oxygen.
A. calcium B. potassium C. zinc D. phosphorous E. iron
When we speculate about the origin of life from inorganic material it seems logical that several events or steps were necessary. Which of the following is not a part of these ideas?
A. Organic molecules must first be formed from inorganic molecules. B. Basic organic molecules form RNA that can serve as the genetic material and catalyze other reactions. C. RNA becomes self-replicating. D. The inorganic molecules must be collected together and segregated from other molecules by a membrane.
The experiments that clearly distinguished DNA and not protein as the hereditary material were conducted by _____.
A. Pauling B. Hershey and Chase C. Griffith D. Watson and Crick E. Avery