Which characteristics accurately describe most reptiles? Check all that apply. are invertebrates are ectotherms have external fertilization lay eggs have a three-chambered heart

A new type of communication system has been discovered that consists of thin, highly elongated tubules capable of conducting cell-surface proteins, cytoplasmic vesicles and calcium signals from one cell to another. This system is referred to as: A.

Controlled burns would be used in forests a. where there high densities of endangered species, such as tropical rain forests. b. that have heavy recreational use to warn people about the dangers of fires. c.

What is one main reason we need water?

Explain speciation and what drives it.

What's another name for the water cycle? A. evaporation cycle B. hydrological cycle C. condensation cycle D. hydrogen cycle

Exposure to secondhand smokes carries the same long-term health risk as smoking

Which of these changes occurs near the end of the third trimester of fetal development? A. All parts of the eyes begin to develop, B. The sex of the fetus becomes obvious. OC. The fetus moves to a head-down position, O D.

What are characteristics of absorption spectra? Check all that apply.

1. What tissue of the chicken wing is commonly referred to as meat? 2. Explain the riles of muscles, tendons, bones, ligaments, cartilage, and joints in the back-and-forth movement of the lower chicken wing.

What is the basic unit of all living things? organ tissue organ system cell