A. flower color is red; AA. flower color is blue
An example of parallel choices in a key is, A. flower color is red; AA. flower color is blue.
-Dichotomous key allow the user to determine the identity of items using a sequence of alternative choices. Dichotomous keys always give two, mutually exclusive choices in parallel statements. The pair of statements is referred to as a couplet and each 1/2 of a couplet is a lead. At each couplet of a dichotomous key the user is presented with two choices about a specific character present in the group of organisms, a specific character state is described for each lead.
-Sometimes the characters are quantitative (i.e., measurements) and sometimes the characters are qualitative (e.g., texture). As the user makes a choice about a particular characteristic of an organism s/he is led to a new branch or couplet of the key. Each couplet provides characteristics that become progressively more specific until the final step is reached and identification is made.
1) gene flow
- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.
-a zebra migrates to join a different herd of zebras.
2) natural selection
- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.
-competition for sunlight leads to taller trees.
- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.
-the dna of a snake changes to make its venom stronger.
4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.
-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.
archaebacteria are found in in forest soil.
hope i spelled it right lol
a. flower color is red; aa. flower color is blue<...