Alexandra and Nicholas Romanov had four daughters and one son. Alexandra was a carrier for: 

On the pedigree below, what does a line between male and female represent?

This is a pedigree of a family with Hemophilia B. What is the genotype of Individual 12?

Carriers of Hemophilia B have long blood clotting times than homozygous dominant individuals.

On the pedigree shown below, what individuals are male?

Select all that apply:  Soils of rainforests are less fertile than soils of seasonal forests because…

The Cecropia tree is a very common late-successional species in tropical rain forests.

Plants that often grow on other plants and spend all or part of their life not rooted in the soil are known as ___________. [blank1]

Seasonal flooding contributes to the horizontal complexity of the rainforest in the following ways:

Choose the words from the dropdowns that correctly completes the sentence: Igapó forests are flooded by [blank1] water rivers, that tend to be [blank2]-moving and carry [blank3] nutrients.