What is the first land mammal shown to reach the African wet lands

The human immunodeficiency viris (hiv) is a bloodborne pathogen that is spread by

Which of the following may be found in eukaryotic cells, but not in bacteria? ribosomes DNA plasma membrane flagella endoplasmic reticulum

A skeleton forming outside the animal's body is a (n) a. endoskeleton. b. exoskeleton. c. notochord. d. vertebrate

In a study involving genetic traits a sample is large enough if it?

What is by far the leading cause of water pollution? select one: a. ocean-going shipping b. agriculture activities c. mining d. sewage treatment plants e. factories next?

True or False: carbon emissions lead to global warming by trapping the suns heat in the atmosphere

Organisms best suited to the environment will be the ones that survive and reproduce. This statement best describes A. Natural Selection B. Punctuated Equilibrium C. Adaptive Radiation D. Artificial Selection

External vs Internal environment

According to this food web, which of the following would be considered secondary consumers? Group of answer choices Plants Grasshoppers Wolves Mushrooms

Is a nucleic acid that contains the genetic information for heredity in most organisms. A. a chromosome B. genetics C. a gene D. heredity E. DNA