How have animals adapted to the Galapagos Islands?

How have animals adapted to the Galapagos Islands?

These adaptations include a short, blunt stout, a long, flat, incredibly strong tail that propels it through the water, and a special gland that allows it to expel excess salt from its body. But perhaps the marine iguana’s most remarkable adaptation is its ability to shorten its body length during lean times.

What is special about Galapagos iguanas?

The Galapagos marine iguanas are a good example: their mainland ancestors lived in trees, eating fruit. Once in Galapagos, they adapted to eating underwater algae and living on rocky shores. Like all reptiles, the species in Galapagos have life cycles of mating, nesting, marking territory, etc.

What are two adaptations that Darwin observed on the Galapagos Islands?

For example, a population of giant tortoises found in the Galapagos Archipelago was observed by Darwin to have longer necks than those that lived on other islands with dry lowlands. These tortoises were “selected” because they could reach more leaves and access more food than those with short necks.

What are four pieces of evidence for common ancestry?

Evidence for evolution: anatomy, molecular biology, biogeography, fossils, & direct observation.

Are humans evolving upwards or downward?

Far from slowing down, human evolution has sped up in the past 40,000 years and has become 100 times faster in the past 5000 years alone, according to the analysis.

What are 3 types of mutations?

There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu —–> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.

What are some effects of mutation?

Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.