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Fertilizer runoff can cause algal blooms in lakes.

The maximum population density of a given species that a defined geographical area can sustain over time is known as the ______________. 

Temperature, available water, the seasons, and nutrient availability all contribute to determining which biome exists in a given area. 

My favorite flowers, orchids, grow in the tops of trees in the middle of a rainforest.  The tree is not affected but its height allows the orchid to get closer to the sun.  What type of relationship is this? 

A zoologist has found that a certain species of woodpecker nests only in dense, old growth forests and feeds on large insect larvae from the upper canopy.  She has described this species’ __________.

Using a codon chart, the codon sequence ACC codes for tryptophan. 1st base in codon 2nd base: A 2nd base: G 2nd base: T 2nd base: C 3rd place: A Phenylaline Serine Tyrosine Cysteine A A Phenylaline Serine Tyrosine Cysteine G A Leucine  Serine Stop Stop T A Leucine Serine Stop Trytophan C G Leucine Proline Histidine Arginine A G Leucine Proline Histidine Arginine G G Leucine  Proline Glutamine Arginine T G Leucine Proline Glutamine Arginine C T Isoleucine Threonine Asparagine Serine A T Isoleucine Threonine Lysine Serine G T Isoleucine Threonine Lysine Arginine T T Methionine Threonine Aspartate Arginine C C Valine Alanine Aspartate Glycine A C Valine Alanine Glutamate Glycine G C Valine Alanine Glutamate Glycine T C Valine Alanine Glutamate Glycine C

All organisms, from bacteria to plants to humans, have 46 chromosomes.

Given all the bad things that mutations do, it seems counterintuitive that a low rate of mutation is actually good.  What good could possibly come of mutations?

What is/ are the function(s) of cell division?

Colorblindness is a sex-linked trait.  If dad is colorblind, and mom is a carrier, which of the following is true?