The three domains are _____. a. Archaea, Bacteria, and Eukarya b. Archaea, Prokaryote, and Eukarya c. Bacteria, Eukarya, and Animalia d. Animalia, Plantae, and Bacteri

 A. Archaea, Bacteria, and Eukarya

Explain -

1. Archaea : This domain consists of single-celled organisms that do not have a nucleus. Archaea are similar to Bacteria, which is why they were originally thought to be a type of bacteria, but they are actually quite distinct. Archaea live in a wide variety of habitats, including extreme environments like hot springs, salt lakes, and the deep sea, which is why they're often referred to as extremophiles. They have unique biochemistry and genetic sequences that set them apart from Bacteria.

2. Bacteria : Also single-celled, these organisms lack a nucleus as well and were once grouped together with Archaea in the old classification system. Bacteria are found virtually everywhere on Earth and come in a vast array of shapes and sizes. They play essential roles in ecosystems, including the human body, where they make up a significant part of the gut flora and perform various functions that are critical for health.

3. Eukarya : Unlike Archaea and Bacteria, Eukarya have cells with a nucleus where the genetic material is enclosed. This domain includes all the organisms that have more complex cells, including fungi, plants, animals, and protists. Eukaryotes can be single-celled like yeast, or they can form complex multicellular organisms like humans, trees, or mushrooms.