In order for cells in multicellular organisms to exchange gases, a circulatory system must be present.

a. true

b. false

Which statement is true of x chromosome?

Animals detect chemicals with sensory receptors on taste buds called

You discover a pattern of a 20 amino acid sequence at the C-terminus of over 50 proteins in an organism.

If xenon has an atomic number of 54 and a mass number of 108, how many neutrons does it have? 54 27 100 108

student measures the mass of a paper clip. The students data table is shown below. The acceptable value for the paper clips is 1.14g. Trial # Mass 1 2.45 g 2 2.40 g 3 2.

A person exhibiting a recessive characteristic must be heterozygous for that gene. True or False

Which statements best describe the first stage of cellular respiration? Check all that apply. •The stage happens in cytoplasm. •The stage happens in mitochondria. •Oxygen combines with small molecules. •Glucose is broken down. Energy is released.

Explain why conservation is the most important strategy in the soil management programs of agriculture.

Where are tropical wet climates found in the United States?

Any part of an ecosystem that is a biotic is A - thriving B - nonliving C - symbiotic D - related to water