Which of the following represents an ecological niche? Honeybees making honey from flower nectar in a grassland ecosystem
The mud in a pond ecosystem
The cacti in a desert ecosystem
Robins and sparrows living together in the same tree in a forest ecosystem

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Pls quickly! which of the following is true about the behavior of an organism? a. the behavior of an organism is influenced by both its heredity and it’s environment. b. the behavior of an organism is influenced only by the treats it inherits from its parents. c. the behavior of an organism is influenced only by the environment in which it lives in. d. the behavior of an organism is not influenced by either it’s heredity or its environment.

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits