Arthropods are joint- legged animals. Spiders, crabs, pill bugs, centipedes, and millipedes are examples of the many types of arthropods. Which of these arthropod groups are most closely related?

3. What is the smallest level of classification - where the organisms can mate with each other and where the offspring can also mate and produce offspring?

Both euglena and cyanobacteria are photosynthetic unicellular organisms found in pond water. The feature that distinguishes euglena (Protista) from cyanobacteria is the —

5. The scientist that created the modern classification system is...

Each species of organism has a universally accepted scientific name that scientists assigned using a system known as --

Which trait is shared by the organisms classified in kingdoms Protista, Plantae, Fungi, and Animalia?

A student collected the animal shown on a field trip. The student used a dichotomous key and a microscope to classify the animal. How should this animal be classified?

According to the cladogram, lungs are a trait that is present in which of the following organisms?

A scientist exploring in the rainforest found an unclassified organism. It was multicellular and made of multiple thread-like structures. The organism had cells with a nucleus and a cell wall made of chitin. The scientists should classif

Based on their scientific names, a scientist would know that the organisms Entamoeba histolytica and Entamoeba dispar do not belong to the same --

Which kingdom contains multicellular heterotrophs without cell walls?

Which two vertebrates are most closely related?