Category: biology

Biology: metabolic cost

Self-tutoring about biology and zoology: the tutor researches American alligators. Alligators in southern Florida typically develop more slowly than those of northern Florida. A suggested reason is metabolic cost. Being cold-blooded, an alligator’s metabolism increases with the surrounding temperature. Therefore,

Biology: what is a relict?

Self-tutoring about biology: the tutor mentions the term relict. relict (noun): a population that was once included by a larger one, but has grown isolated due to changing conditions. Changing climatic conditions can cause relicts, as can changing geography (collapse

Botany: cherry birch identification

Self-tutoring about tree identification: the tutor mentions cherry birch. Waiting last week at an office, I gazed out the window, where a tree drew my attention. The tree had a few familiar features; never had I seen them in the

Tree identification: sweetgum, part II

Self-tutoring about local trees: the tutor mentions the sweetgum for the second time. Back on September 15, 2015, I noted a sweetgum tree in Campbell River. Its star-shaped leaves were how I identified it. Yesterday, I saw one without leaves

Dawn redwood, part III: winter mode

Self-tutoring about local trees: the tutor makes another observation about local dawn redwoods. I wrote a few posts about local dawn redwoods, the most recent here. It will lead interested readers back to earlier ones. Dawn redwood is deciduous here.

Zoology: competitive exclusion principle: American alligator and American crocodile in south Florida.

Self-tutoring about reptiles: the tutor looks into the relationship between the American alligator and crocodile. Only one habitat in the world is shared, naturally, by both alligators and crocodiles: the everglades of south Florida. The American alligator, and the American

Botany: dawn redwood, part II

Self-tutoring about dawn redwoods: the tutor shares some ideas about identifying them. In my past two posts,

Botany: dawn redwood, part I

Self-tutoring about botany: the tutor shares an exciting find from the field. In yesterday’s post I mention a long connection I have with dawn redwoods, despite only recently becoming acquainted. The dawn redwoods themselves have a story. Scientists discovered dawn

Botany: artichoke identification

Self-tutoring about botany: the tutor identifies a plant he saw. Yesterday, in a sidewalk garden, I noticed a striking plant. It had big purple flowers, perhaps 8 to 10cm across, consisting of many long filaments. The flowers reminded me of

Botany: linden (basswood) tree

Self-tutoring about trees: the tutor mentions a linden he’s noticed. In the northwest corner of a local sports field is a hardwood tree, perhaps 70 ft tall. Its trunk is oval; its max diameter might be 18 inches. The bark