This is the genus that includes modern humans and species closely related to them and is estimated to be about 2.3 to 2.4 million years old.

Although not quite as crucial, there are changes to the digestive and excretory system that will affect you during the hike up the mountain. Explain why digestive functions decrease and kidney function increase.

which of the following pairs of structures are analogous? insect wing and bird wing, bat wing and dolphin flipper, horse leg and human forearm, hummingbird wing and seal flipper

Orchids are flowering plants that depend on bees for pollination. A population of orchids in a rainforest has reached its carrying capacity. The size of the rainforest's bee population is a limiting factor of the orchid population.

which term describes this example? a rabbit's cells have two sex chromosomes that are different. A. homozygous dominant B. homozygous recessive C. heterozygous D. male

Why does carbon bond well with itself and make a stable compound? A. the number of electrons present in carbon B. carbon only bonds with other carbon atoms C. carbon does not easily bond with itself

Why do scientists rely on scientific names rather than common names to classify organisms

How do the three basic groups of the six-kingdom system differ from those of the 5-kingdom system?

What are the weakness and strengths of Behavior

Most glaciers in Alaska are retreating, although the average annual snowfall has increased in the last few decades. What does this tell us about what is happening to sea-level temperature?

Jessi consumes a diet of 1920 total kcalories that has 80 g of fat. what percent of jessi's diet comes from fat? (give answer to the appropriate reporting digit. only give the value. do not include the term percent or its abbreviation.)