Answer the following question given this paragraph: Q: What is it in bone marrow transplants that may cause a graft versus host reaction? Choices: - tumors - neutrophils - cancer - lymphocytes A:
lymphocytes
Answer the following question given this paragraph: Plasma membranes are primarily made up of phospholipids (orange). The hydrophilic ("water-loving") head and two hydrophobic ("water-hating") tails are shown. The phospholipids form a bilayer (two layers). The middle of the bilayer is an area without water. There can be water on either side of the bilayer. There are many proteins throughout the membrane. Q: What substances that primarily comprise plasma membranes form a bilayer? Choices: - amino acids - enzymes - steroids - phospholipids A:
phospholipids
Q: Answer the following question given this paragraph: Q: A group of genetically identical individuals is called what? Choices: - brother - replicant - a man - a clone A:
A: a clone
Question: Answer the following question given this paragraph: After hatching, most arthropods go through one or more larval stages before reaching adulthood. The larvae may look very different from the adults. They change into the adult form in a process called metamorphosis. During metamorphosis, the arthropod is called a pupa. It may or may not spend this stage inside a special container called a cocoon. A familiar example of arthropod metamorphosis is the transformation of a caterpillar (larva) into a butterfly (adult) (see Figure below ). Distinctive life stages and metamorphosis are highly adaptive. They allow functions to be divided among different life stages. Each life stage can evolve adaptations to suit it for its specific functions without affecting the adaptations of the other stages. Q: What is the process of larva becoming an adult called? Choices: - parthenogenesis - synthesis - evolution - metamorphosis A:
Answer: metamorphosis
*Question*
Answer the following question given this paragraph: Even if Laura didn't try to stop the skateboard, it would stop sooner or later. That's because there's also friction between the wheels and the pavement. Friction is a force that counters all kinds of motion. It occurs whenever two surfaces come into contact. Q: What force occurs whenever two surfaces come into contact? Choices: - tension - vibration - gravity - friction A:
**Answer**
friction
Q: Answer the following question given this paragraph: Echinoderms are named for their "spiny skin. " However, the spines aren't on their skin. They are part of the endoskeleton. The endoskeleton consists of calcium carbonate plates and spines, covered by a thin layer of skin. Adult echinoderms have radial symmetry. This is easy to see in the sea star and sand dollar in Figure above . However, echinoderms evolved from an ancestor with bilateral symmetry. Evidence for this is the bilateral symmetry of their larvae. Q: What type of organism, including sea stars and sand dollars, is named for their spiny skin? Choices: - mollusks - diatoms - chordates - echinoderms A:
A: echinoderms