You are presented with the question "What group of animals do frogs belong to?" and the following answer choices: - four limbs - animals - fish - warm-blooded - reptiles - Amphibians - more abundant - mammals Now knowing that amphibians have a relatively complex circulatory system with a three-chambered heart and frogs have a three-chambered heart, consisting of two atria and a single ventricle, choose the best answer.
Amphibians

You are presented with the question "What lasts only as long as the proteins that attach to an antigen survive in body fluids?" and the following answer choices: - hospitalization - recovery - parasites - solid, liquid, gas - Leptospirosis - Allergies - resistance - passive immunity Now knowing that passive immunity lasts only as long as the antibodies survive in body fluids and an antibody is a protein that attaches to an antigen, choose the best answer.
passive immunity

You are presented with the question "_ are passed from lower to higher trophic levels" and the following answer choices: - fossil fuels - rays or beams - nutrients - environment - animals - heat produced - Most plants - Light Now knowing that energy is passed up a food chain or web from lower to higher trophic levels and an example of chemical energy is food nutrients, choose the best answer.
nutrients

You are presented with the question "Chromosomes contain genes, which code for" and the following answer choices: - Most plants - Plants growth - body tissue - Animal survival - animals - Chemical energy - peachleaf willow - A Greek letter Now knowing that chromosomes contain genes, which code for proteins and protein builds and repairs body tissue, choose the best answer.
body tissue