You are presented with the question "What do geologists use to determine the age of rock layers?" and the following answer choices: - Chemical dating - Mechanical dating - Non radioactive dating - blastoids - single-celled organisms - Seismometer - Radioactive dating - an electron microscope Now knowing that radioactive dating is used to determine the age of fossils and geologists use fossils to determine the age of the rock layer that it was found in, choose the best answer.
Radioactive dating
You are presented with the question "What is one thing all organisms do?" and the following answer choices: - Eat food through the mouth - converting mass to energy - Remove waste from the body - Walk on two legs - eat plants or other animal - by keeping them warm - produce offspring - Hatch from eggs Now knowing that excretion is the process of removing wastes and excess water from the body and all organisms excrete wastes, choose the best answer.
Remove waste from the body
Q: You are presented with the question "What don't arthropods have?" and the following answer choices: - an exoskeleton - legs - Bodily water - Damaged hearing - kinetic energy - a backbone - Energy - backs Now knowing that arthropods are the largest phylum of invertebrates and invertebrates are animals without a backbone, choose the best answer.
A: a backbone
Question: You are presented with the question "What are used for communication by two people by transmitting waves?" and the following answer choices: - satellites - A Greek letter - Morse code - mitosis - telephones - energy - electricity - photosynthesis Now knowing that telephones are used for communication by two people by transmitting sound and sound waves are longitudinal waves, choose the best answer.
Answer: telephones
*Question*
You are presented with the question "What are single-celled organisms that lack a nucleus?" and the following answer choices: - ferns - barnacles - Most plants - cacti - Leeuwenhoek - orchids - bacteria - PDAs Now knowing that prokaryotes are single-celled organisms that lack a nucleus and bacteria are said to be prokaryotes , choose the best answer.
**Answer**
bacteria
You are presented with the question "what contains genetic instructions?" and the following answer choices: - Most plants - Chlorophyll - Plant reproduction - red hair - deoxyribonucleic acid - freckles - Veins and arteries. - h2o Now knowing that dNA contains genetic instructions for proteins, and RNA helps assemble the proteins and dNA DNA is deoxyribonucleic acid, choose the best answer.
deoxyribonucleic acid