A plant is kept in a sealed jar without sunlight. Which type of organism can still produce its own food?

A tomato plant shows yellowing between the veins of young leaves while the veins remain green. Which micronutrient is most likely deficient?

A plant grows small leaves with dried tips and abnormal terminal buds. Which macronutrient is most likely lacking?

A gardener wants to improve flowering and fruiting in his plants. Which nutrient should he focus on adding?

A plant is unable to open and close its stomata properly, causing mottled leaves and dead tissue spots. Which nutrient is most likely deficient?