Which statement describes ferns?

A. They have tall, exposed stems.

B. They only have a sporophyte stage.

C. They use spores to reproduce.

D. They are anchored by rhizoids.

Quantum numbers arise naturally from the mathematics used to describe the possible states of an electron in an atom.

determinar la energia potencial de un cuerpo que partiendo del reposo cae desde una altura de 50 mtrs cuya masa es de 10 kg

From identifying the elements that make up a star, astronomers can determine the star's what?

Calculate the theoretical value for the number of moles of CO2 that should have been produced in each balloon assuming that 1.45 g of NaHCO3 is present in an antacid tablet.

Magnesium and nitrogen react in a combination reaction to produce magnesium nitride. 3 mg + n2? mg3n2. in a particular experiment, a 9.27 g sample of n2 reacts completely. the mass of mg consumed is

Is hydrogen sulfide a heterogeneous mixture solution compound or element?

Explain why people who like to stay cool on a hot summer day prefer to wear white clothing?

Which of these is a chemical property? A. Mercury is a dense liquid. B. Iodine vapor has a purple color. C. Aluminum is a very conductive metal. D. Ice melts at 0°C. E. Iron rusts in wet weather.

Which of the following is not true about the importance of the carbon cycle to living things? a. Plants use carbon dioxide to make energy. b. Carbon is the second most abundant molecule in organisms. c.

Fruit flies can either have a brown body or a black body. The allele for a brown body (B) is dominant to the allele for a black body (b). A brown fruit fly was crossed with a black fruit fly as shown below.