HELLPPP Which of the following is the MOST common source of indoor
air pollutants in less-developed
countries?

A. poorly ventilated cooking fires
B. carbon monoxide from vehicles
C. cleaning solvents
D. air-conditioning units

This is a coral reef ecosystem. many biotic and abiotic factors affect the health of this ecosystem. which set correctly pairs a biotic factor and an abiotic factor?

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality