Which of these characteristics is common only at the embryonic stage of fish and humans, and is suggestive of a common ancestor between the two? a) presence of lungs b) presence of a tail c) presence of gill slits eliminate d) presence of a vertebral column

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?