Which terms can be used to refer to members of a food chain that make their own food? Select all that apply.

A. Autotrophs
B. Heterotrophs
C. Scavengers
D. Consumers
E. Producers​

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.