Which of the following molecules form cellulose, which gives plants structure?

A. Nucleic acids

B. Water

C. Lipids

D. Carbohydrates

Describe the relationship between the amount of gill affected and oxygen consumption in the fish

Which of the following is the measure of the chair's mass, or the amount of particles it has? A. the length of a chair B. the temperature of the chair C. the color of the chair D. the amount of matter in the chair

Denny has been diagnosed with narcolepsy, and suffers from cataplexy and the occasional episode of sleep paralysis. Denny has:

What is one advantage of sexual reproduction over asexual reproduction? A. an increase in genetic variation B. an increase in genetic mutation C. a continuation in genetic weakness D. a decrease in genetic variation

Describe two communication differences between the nervous system and endocrine system.

1. An ecosystem consists of one oak tree on which 10,000 herbivores are feeding. These herbivores are prey to 500 spiders and carnivorous insects. There birds of the same species are eating these spiders and carnivorous insects.

With which of the following statements would a biologist be most inclined to agree? A) Humans and other apes represent divergent lines of evolution from a common ancestor.

The best model of organisms' complex feeding relationship is a (n) A. Food web B. Food chain C. Energy link D. Energy pyramid

Which element of the scientific process cannot be changed? A. A theory B. A data record C. A hypothesis D. An experimental procedure

Which groups of animals was The first land dweller