Was one of the first psychologists to use positive reinforcement to teach basic self- skills to people with developmental disabilities and also train marine mammals for the u. s. navy

Which kind of organism is a heterotroph?

For 50 pointsfredrika's science teacher asked her to bring in three abiotic items from her backyard ecosystem. which of the following groups of items should she bring? a. a lightning bug, a plug of grass, and a wormb. a smooth rock, some red dirt, and an empty bird's nestc. a ladybug, a spider, and some water from a mud puddled. a caterpillar, a pine cone, and a piece of a robin's egg

Ato z on the bun timeline show where the events listed a through g board blow fit on the timeline