Which best describes the role of the esophagus in digestion?

A : it release acid and mixes food

B : it aids in absorption of nutrients from food

C : it carries food from the mouth to the stomach

D : it carries food from the stomach to

Which ocean floor feature is found near almost every subduction zone around the world. A:atoll B:seamount C:trench D:abyssal plain

An open-minded scientist does all of the following except: A. think creatively to design experiments. B. ask questions about observations. C. question existing ideas. D. hold on to his or her beliefs even if there is no evidence for those beliefs.

What is one drawback of using evidence found in rock layers to determine a relative history of the earth? 1. not all organisms leave fossils 2. not all layers contain salt deposits 3. all areas of earth have distinct rock layers 4.

What are the building blocks of minerals 1. Rocks 2. Elements 3. Isotopes 3. Electrons

Como se llego a la idea de la evolución?

Snakes and worms have no legs and share a similar tube-like body structure. Describe how you could determine how closely related these two types of organisms are.

Which domain (s) include species whose cells have cell walls? A. Archaea B. Bacteria C. Archaea and Bacteria D. Archaea, Bacteria, and Eukarya

In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons.

Oxidative phosphorylation is the third step in cellular respiration. It is composed of two smaller steps (electron transport chain and chemiosmosis). What molecules are donating their energy to power the proteins in the ETC?

Wow was important for Mandel to study a large sample of pea plants