Upon closer inspection of the leaves of flower of stone, one can observe tiny, cone-like structures. Each cone-like structure emits spores of two different sizes. Based on this information, which of the following can be properly inferred about flower of stone? 1. It is heterosporous.2. It is a fern.3. The cone-like structures are sori.4. It is a lycophyte.5. It has separate male and female gametophytes.

The image shows embryos of three vertebrate classes

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .

How would the function of synovial joints be changed if they lacked joint cavities and the bones were united instead?