Answer the following question given this paragraph: Probably the most important feature of a cell's phospholipid membranes is that they are selectively permeable or semipermeable . A membrane that is selectively permeable has control over what molecules or ions can enter or leave the cell, as shown in Figure below . The permeability of a membrane is dependent on the organization and characteristics of the membrane lipids and proteins. In this way, cell membranes help maintain a state of homeostasis within cells (and tissues, organs, and organ systems) so that an organism can stay alive and healthy. Q: A membrane has what property if it can control what molecules or ions enter or leave the cell? Choices: - indiscreet permeability - impermeability - susceptible permeability - selective permeability A:
selective permeability
Answer the following question given this paragraph: Herbivores such as zebras and elephants live in herds . Adults in the herd surround and protect the young, who are most vulnerable to predators. Q: Why do adult herbivores in a herd surround their young? Choices: - to protect them from other adult herbivores - to keep them warm on long cold nights - to show them love - to protect them as they are vulnerable to predators A:
to protect them as they are vulnerable to predators
Q: Answer the following question given this paragraph: Modern plants that live in water are called aquatic plants . Living in water has certain advantages for plants. One advantage is, well, the water. There's plenty of it and it's all around. Therefore, most aquatic plants do not need adaptations for absorbing, transporting, and conserving water. They can save energy and matter by not growing extensive root systems, vascular tissues, or thick cuticle on leaves. Support is also less of a problem because of the buoyancy of water. As a result, adaptations such as strong woody stems and deep anchoring roots are not necessary for most aquatic plants. Q: What type of plants do not typically require deep roots or woody stems? Choices: - surface plants - dry plants - bacterial plants - aquatic plants A:
A: aquatic plants
Question: Answer the following question given this paragraph: Covalent bonds form because they give atoms a more stable arrangement of electrons. Look at the oxygen atoms in the Figure above . Alone, each oxygen atom has six valence electrons. By sharing two pairs of valence electrons, each oxygen atom has a total of eight valence electrons. This fills its outer energy level, giving it the most stable arrangement of electrons. The shared electrons are attracted to both oxygen nuclei, and this force of attraction holds the two atoms together in the oxygen molecule. Q: What do covalent bonds give atoms a more stable arrangement of? Choices: - protons - neutrons - cell walls - electrons A:
Answer: electrons
*Question*
Answer the following question given this paragraph: This super fast train can obviously reach great speeds. And there's a lot of technology that helps this train go fast. Speaking of helping things go fast brings us to enzymes. Life could not exist without enzymes. Essentially, enzymes are biological catalysts that speed up biochemical reactions. Q: What are biological catalysts that speeds up biochemical reactions? Choices: - carbohydrates - hormones - proteins - enzymes A:
**Answer**
enzymes
(Question)
Answer the following question given this paragraph: Q: What is the study of the chemical elements necessary for plant growth called? Choices: - photosynthesis - phototropism - plant propagation - plant nutrition A:
(Answer)
plant nutrition