Where are chromatids held together?

Which condition is a biotic factor of an aquarium ecosystem? A) Algae growing on the glass. B) Gravel on the bottom of the aquarium. C) Amount of oxygen in the water. D) Temperature of the water.

Wilhelm Wundt is so awesome! In addition to adding the scientific method for psychology, he is well known for creating a) Functionalism b) Humanism c) Structuralism d) Behaviorism

explain how repressible and inducible operons differ and how those differences reflect differences in the pathways they control

What are sections of DNA that produce the proteins which control the characteristics of an organism?

Which of the following DOES NOT represent support for Wegener's hypothesis of continental drift? Coastlines of continents separated by oceans seem to fit like a puzzle Ages and types of rocks on continents separated by oceans are similar Fossils of

Which of the following statements describes a proton of an atom? A has a negative charge and is located in the nucleus. B has no charge and is located in the nucleus C has a positive charge and is located in outer energy levels.

What are reasons scientists use models? To study objects far away To study objects too large To study objects too small. To study objects easily found in a lab. To study events that take place over long periods of time.

1. true false Carbon atoms form the building blocks of most living things.

Inhibiting enzymes involved in cell wall synthesis leads to which of the following? A) cell death by osmotic lysisB) a reduction in protein synthesisC) the incomplete synthesis of the bacterial cell wallD) a reduction in the amount of usable energy

In the 20th century where did the most ecologically destructive oil spill in the US