Both birds and mammals have four-chambered hearts. but birds are more closely related to crocodiles, which have three-chambered hearts, than they are to mammals. the correct interpretation of these observations is that:

How do opposing groups of muscles work?

15. How are mitochondria similar to prokaryotic cells?

Which of the following is a starch? A. steak B. grain C. yogurt D. bacon

Describe differences between replication in prokaryotes and eukaryotes

What are the 3 kinds of ecological pyramids?

Which of the following is correctly matched? a) Scoliosis: abnormal lateral curvature b) Kyphosis: accentuated lumbar curvature c) Lordosis: rupture of the annulus fibrosus d) Herniated disc: dorsally exaggerated thoracic curvature

Usually or always are words describing A. Generalization B. Humidity C. Investigations

For each of the situations described below, explain which hormone (s) might be responsible for the condition as well as which endocrine gland (s) is/are responsible for producing the hormone (s)

A pesticide used by a farmer begins to appear in the tissue of carnivores that live far from the farm. which of the following is the best inference about this situation? a. the pesticide is not effective. b.

180:9 * (-12) : 6 - (100:5)