Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?

Name two types of radiation that have an ionising effect on human tissue.

Match each lipid with its correct components or description. 1) glycerophospholipids A) built on sphingosine 2) cerebrosides B) anionic phospholipids containing one or more sialic acid residue 3) gangliosides C) lipids with phosphate-containing head

If your body has 42 chromosomes, how many will your gamette have

Structures that are similar due to common ancestry are called:

Which of the following bacterial genera produce (s) endospores? a. Lactobacillus b. Bacillus c. Clostridium d. both Bacillus and Lactobacillus e. both Bacillus and Clostridium

Wind can transport particles of many different sizes. What sized particles are probably carried the farthest by the wind?

A country that has been relatively poor is starting to become wealthier. This has brought many people into the capital city, causing the population to grow very rapidly.

An inactive gene inherited from an ancestor is an example of which kind of evidence for evolution? A. DNA B. fossil C. anatomical D. radiometric

Which choice is a biotic factor of an ecosystem soil air ants sun

Which of the following are necessary for a seed to germinate? 1. moisture content of seed must be at least 9% 2. Moisture content of the seed must be less than 9% 3. certain enzymes in the seed are activated 4. temperature must be above 80 degrees 5.