Answer the following question given this paragraph: Regardless of whether reactions are exothermic reactions or endothermic reactions , they all need energy to get started. This energy is called activation energy . Activation energy is like the push you need to start moving down a slide. The push gives you enough energy to start moving. Once you start, you keep moving without being pushed again. Activation energy is defined as the energy that must be overcome in order for a chemical reaction to occur, or the minimum energy required to start a chemical reaction. The concept of activation energy is illustrated in Figure below . Q: What do you call the energy that must be overcome in order for a chemical reaction to occur, or the minimum energy required to start a chemical reaction? Choices: - expression energy - phase energy - kinetic energy - activation energy A:
activation energy
Answer the following question given this paragraph: Q: Some membrane proteins that actively transport ions contribute to what? Choices: - organism potential - protein potential - cellular potential - membrane potential A:
membrane potential
Q: Answer the following question given this paragraph: 28.5 Red algae and green algae are the closest relatives of land plants. Q: Red algae and green algae are the closest relatives of what? Choices: - transfer plants - arctic plants - water plants - land plants A:
A: land plants
Question: Answer the following question given this paragraph: A grain of pollen is a tiny male gametophyte enclosed in a tough capsule (see Figure below ). It carries sperm to an ovule while preventing it from drying out. Pollen grains can't swim, but they are very light, so the wind can carry them. Therefore, they can travel through air instead of water. Q: What can be described as a tiny male gametophyte enclosed in a tough capsule? Choices: - seed - cell - dna - grain of pollen A:
Answer: grain of pollen
*Question*
Answer the following question given this paragraph: The way in which a reaction is written influences the value of the enthalpy change for the reaction. Many reactions are reversible, meaning that the product(s) of the reaction are capable of combining and reforming the reactant(s). If a reaction is written in the reverse direction, the sign of the changes. For example, we can write an equation for the reaction of calcium oxide with carbon dioxide to form calcium carbonate. Q: The reaction of calcium oxide with carbon dioxide forms what? Choices: - nitrogen carbonate - carbon monoxide - nitrogen - calcium carbonate A:
**Answer**
calcium carbonate
(Question)
Answer the following question given this paragraph: Brightly colored fruits attract animals that may disperse their seeds. It's hard to miss the bright red apples on these trees. Q: What is an advantage of brightly colored fruits? Choices: - make pretty paintings - dyes for clothing - warning of poisons - attract animals to disperse their seeds A:
(Answer)
attract animals to disperse their seeds