Which statement is NOT correct about the sporophyte generation in gymnosperms?
a) It is the diploid generation.
b) They are homosporous.
c) It contains vascular tissue.
d) They produce winged naked seeds.
e) It is the dominant generation.
Ans: b) They are homosporous.
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Oxygen-16 is abundant and has 8 protons and 8 neutrons. Oxygen-18 has two extra neutrons. These two forms are:
A. oxygen ions. B. oxygen dimers. C. oxygen isomers. D. oxygen isotopes.
According to the intermediate disturbance
hypothesis, a. species richness becomes greatest in between disturbances of moderate intensity or frequency. b. a disturbance is necessary during succession in order to stabilize the community. c. community succession is highly predictable. d. competition and other species interactions are the most important factors in shaping community structure. e. a community reverts to a climax state after a disturbance.
Following DNA replication, the attached copies of each chromosome are called ________
Fill in the blank with correct word.
The internal fertilization that occurs prior to shell deposition has what type of analog in angiosperms?
A) endosperm proliferation B) growth of pollen tube and delivery of sperm nuclei C) fusion of carpels into a fruit D) seed coat hardening