Which animals are invertebrates?

starfish

earthworms

tunicates

amphibians

lancelets

octopus

crab

grasshopper

What is the main purpose of aquaculture? A) To develop new species of animals. B) To provide a food source for humans. C) To preserve the aquatic environments. Eliminate D) To ensure that breeding populations are maintained.

Gymnosperms have been around for at least:

Which is type of disease is a pathogen causes infectious or noninfectious

How is a severed electrical cord similar to a nerve that has been cut?

A new development is being built on the outskirts of a city, near a stream. A parking lot is constructed on one side of the stream, and land is cleared for a playground on the other side.

Name two food making processes

Which of the following are not allowed on public land?

Describe how the development of a special beak shape could affect a bird species' survival.

Durante la meiosis II, usamos el término cromosomas homólogos A:cierto B: falso

Jaden's father is immune to poison ivy. Jaden is also immune to poison ivy. Jaden's immunity to poison ivy is which kind of trait?