Which of the following is a limiting factor in a population of organisms.

fluctuations in atmospheric temperature

availability of food

life spans of the members

reproductive replacement

What cell part is described below? The organic materials between the membrane and nucleus, which contains a variety of tiny bodies, or organelles. 1. chloroplast 2. mitochondria 3. golgi bodies 4. nucleolus 5. nucleus 6. cell wall 7. cytoplasm 8.

Increased food supplies in an ecosystem decrease competition because the competing organisms would a. reproduce more often. b. have enough food to eat. c. store large quantities of food. d. have more space in which to live.

What are the basic units of protein macromolecules?

What is the function of valves in veins

Describe the function of each organelle. Nucleus Ribosome Endoplasmic reticulum Golgi apparatus

Scientists have debated the evolution of three life forms: reptiles, birds and dinosaurs. After many years of reviewing fossil records scientists proposed the evolutionary relationship seen above in the cladogram.

The PNS is divided into several subsystems. What two subsystems form the first major division of the PNS? sensory and motor somatic and autonomic parasympathetic and sympathetic CNS and brain

Consider the model of the food chain. Imagine there is a herbicide poison spill and all the grass is killed. How will this influence the food chain model? A) The grasshoppers will die out. B) All of the consumers will decrease.

A mutation in a dna strand is least likely to affect the cell when the mutation:

What macromolecule has the function of providing structure and catalyzing reactions (as enzymes) ?