Answer:
Many <u>human activities</u> like burning of fossil fuels, cutting of trees, application of nitrogen-based fertilizers, etc can have a major impact on the <u>nitrogen cycle</u>. These human activities and other activities can dramatically increase the amount of biologically available <u>nitrogen</u> in an <u>ecosystem</u>.
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<em>:D</em>
Metamorphic, igneous, and sedimentary.
1. The cells specialize.
A crab has an exoskeleton.
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Answer:
E. Fecal coliforms will likely contain enzymes to counteract toxic oxygen forms.
D. Fecal coliforms will need to acquire trace elements for growth in the lake environment.
C. The lake environment will support the growth of facultative anaerobes.
Explanation:
For the growth and multiplication of bacteria following factors are important required in their environment;
- trace elements
- oxygen
- nutrients
Crossing over at prophase I results in the linked genes (those on the same chromosome) becoming unlinked and separated. Prophase I is this first stage of meiosis, the chromosomes condense, form tetrads, and exchange DNA. The nucleolus and nuclear envelope disappear.