Q1. What do you understand about the following ?
a) Primary producer​

Primary producers are organisms that acquire their energy from sunlight and materials from nonliving sources. Algae, higher plants, and some bacteria and protists are important autotrophs in running waters. Heterotrophs obtain energy and materials by consuming living or dead organic matter.

primary producers

Explanation:

they include plants, lichens, and moss, bacteria and algae. They live in and around organic matter. They are not mobile, they live and grow where there are nutrients to sustain them. In a terrestrial ecosystem they are mostly green plants (photosynthetically active)

example: grass

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

the correct answer in apex is tissue development, i know because i just had this question