What challenges did early plants face living on dry land?

Define radioactivity. if an element has three isotopes, which of them is most likely to be a radioisotope

The use of co2 and h2o by a geranium plant to synthesize glucose illustrates the process of

Question 10 miguel's doctor has recommended that he consume less saturated fat. at his favorite fast-food restaurant, miguel chooses a grilled chicken sandwich. the menu states that the sandwich contains 460 calories, and 6 grams of saturated fat.

What attractive force holds one chlorine atom and one sodium atom together to make the substance salt? A. Cations B. Chemical bonding C. Valence electrons D. Anions

What do primary consumers eat

What are the causes of chemical weathering?

Tascha is on a medication that increases the pH of the stomach and makes it alkaline. What is the effect of this medication? A. The medication hampers bile production. B. Pepsin is unable to break down proteins. C.

Suppose a dog shows a play face to another dog to indicate that the behavior that follows is not aggressive, but playful. which type of signal would this be?

If a mutation in a gene allows a protein to function more efficiently, the resulting effect is most likely to be: Oharmful beneficial neutral

Over the course of Earth's history, many species have evolved. However, many species have also become extinct.