A rise in oxygen in Earth's air and seas put organisms that engaged in _____ at a selective advantage
a. fermentation
b. photosynthesis
c. sexual reproduction
d. aerobic respiration
e. anaerobic respiration
d
You might also like to view...
Which of the following statements about El Niño are true?
_____ Occurrence of El Niño is irregular and unpredictable. _____ The immediate effect of El Niño is a weakening in the east-to-west trade winds _____ Weakening in the trade winds results in more upwelling along the Peru-Ecuador coast. _____ El Niño results in the movement of weather systems from the western Pacific eastward. _____ El Niño events in the Pacific can influence weather as far away as Africa.
Suppose you have a way to measure the amount of DNA in one cell during the cell cycle. You first measure the amount at the G1 phase. At what points in the rest of the cycle will you see a change in the amount of DNA per cell?
What will be an ideal response?
The part of a flowering plant that becomes the fruit is the ________
a. ovule b. embryo sporophyte c. zygote d. ovary
Chemical defenses that some plant species employ to deter germination and growth of other plants are examples of:
a. exploitative competition b. interference competition c. competitive exclusion d. character displacement e. resource partitioning