These tubes are used to carry deoxygenated blood back to the lungs.

What type of resources such as fossil fuels, fresh water, and soils are being used up or degraded by humans?

Jason, a dog breeder, decides to mate a poodle with a golden Labrador Retriever. He wants to get puppies with the curly hair of the poodle and the color of the Labrador.

True/false an atom becomes an ion when its number of protoms change

Which of these must occur during S phase of the cell cycle so that two daughter cells can be produced during M phase? A-The DNA must be replicated. B-The chromosomes must be joined. C-The cytoplasm must be separated.

Termites are insects I live in colonies. in a colony, the king and a queen are responsible for reproduction. workers spend most of their time caring for the other termites and building the nest. Soldiers protect the nest from attacks.

True or false. A good experiment consists of positive & negative controls, an altered variable to be tested and all other variables kept the same

Which statement is true about charles darwin? he was the first to outline the modern theory of evolution. he was the first to ask questions about the origins of life. he was the first to publish the traditional belief of evolution.

As esponjas possuem em seu revestimento interno células denominadas de coanócitos. Qual é a forma e as funçoes dessas células para a esponja?

Explain how speciation, directional, disruptive, and stabilizing selection affect biodiversity.

A steroid hormone uses a receptor protein that has two binding sites, one is a ligand binding site and the other is a dna binding site. what type of receptor is this?