Why does adenine pair with thymine and not cytosine?

Which of the following is the most likely result of converting forestland to urban development? a. the amount of land available for lumber production decreases. b. fewer trees are needed because cities are made mainly of concrete. c. people discover more efficient ways to grow trees. d. the price of lumber goes down.

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?

Vascular plants like this one use sunlight to make food through te process of photosynthesis most food a sugar is made in the plant's leaves how does te plant move the sugar to other parts?