As you learned in the previous research activity, homeostasis is one of the main characteristics of life. A normal body temperature for humans is approximately 98.6 degrees Fareinheit, or, 37 degrees Celcius. Use an online resource to look up the two mechanisms the human body uses to maintain a healthy body temperature. Describe how the body maintains homeostasis. (Hint: another way of thinking about this: What happens when the body gets too hot or too cold.) Different species have different adaptations. Spend a couple minutes researching why dogs pant. Explain how panting helps a dog maintain homeostasis.

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.

What will happen to a population of predators if there is a sudden, temporary increase in the number of prey? a. the population of predators will be uniform with no change. b. the population of predators will increase first and then decrease slowly. c. the population of predators will increase continuously.

Recombinant dna (rdna) creates offspring which are genetically identical to the parent is the process of breeding only organisms with desirable traits involves the removal of the nucleus of a cell combines genes from organisms of different species in a lab