The global fertility rate in recent years has generally been _____
1.increasing at a slow and steady rate
2.getting ready for an explosion of growth
3.declining but still greater than replacement level
4.rapidly vacillating due to famines and disease
3
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Carbon is released into the atmosphere as carbon dioxide through the process of
A) photosynthesis. B) primary production. C) respiration. D) fixation.
Which situation most likely describes a recessive genetic disorder?
A) The mutant allele of the gene encodes a completely nonfunctional protein. B) The mutant allele of the gene encodes a protein that has both the normal function and a new, harmful function. C) The mutant allele of the gene encodes a protein that has a new, harmful function. D) The mutant allele of the gene encodes a protein with the normal function but twice the normal activity.
human activity can release nitrogen into the environment by 2 means
What will be an ideal response?
Which of these is not an example of coevolution between flowers and pollinating bees?
A. Some flowers are bright red with long tubes to hold nectar. B. Flowers have ultraviolet markings visible to bees but invisible to most other insects. C. Bees have tongues to lap up nectar. D. Bees have strong preferences for particular types of flowers and remember where the plants are located. E. Some bees are hairy to collect and carry pollen.