An anthropologist discovers the fossilized heart of an extinct animal. the evidence indicates that the organism's heart was large, was well-formed, and had four chambers, with no connection between the right and left sides. a reasonable conclusion supported by these observations is that the:
a) animal had evolved from birds.
b) animal was endothermic and had a high metabolic rate.
c) animal was most closely related to alligators and crocodiles.
d) animal was likely an invertebrate animal.
e) species had little to no need to regulate blood pressure.

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. threat method number of species that benefit number of years to see benefit habitat fragmentation reforestation 450 8 introduced prey species biological augmentation 150 2 which statement is an accurate explanation of the information in the table? a. biological augmentation would benefit only a few species because it is typically not very effective. b. biological augmentation would take less time to be effective because it targets the majority of prey species. c. reforestation would take the longest time to be effective because trees take several years to grow. d. reforestation would not benefit many species because most forest species live on the ground.

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Describe two recent or ongoing space missions.