2. Compara las siguientes secuencias del gen que codifica para una de las cadenas de la hemoglobina. Luego, realiza las actividades.
ADN normal
CCA
GAA
CAC
CCA
GTA
CGG
TTC
CAG
GGA
ADN mutado
CCA
GAA
CAA
CGA
GTA
CGG
CAG
GGA
a. Escribe la secuencia de ARNm que fabrican las células apartir de estos fragmentos de ADN.​

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?