Q: The myod protein deserves its designation as a master regulatory what? Read this paragraph and choose the correct option from the provided answers: Some organisms can reproduce sexually or asexually. Under what conditions might each type of reproduction be an advantage?. Choices: - hormone - protein - enzyme - gene A:
gene

Q: What are the two methods in which mutations arise in dna? Read this paragraph and choose the correct option from the provided answers: Errors during DNA replication are not the only reason why mutations arise in DNA. Mutations, variations in the nucleotide sequence of a genome, can also occur because of damage to DNA. Such mutations may be of two types: induced or spontaneous. Induced mutations are those that result from an exposure to chemicals, UV rays, x-rays, or some other environmental agent. Spontaneous mutations occur without any exposure to any environmental agent; they are a result of natural reactions taking place within the body. Mutations may have a wide range of effects. Some mutations are not expressed; these are known as silent mutations. Point mutations are those mutations that affect a single base pair. The most common nucleotide mutations are substitutions, in which one base is replaced by another. These can be of two types, either transitions or transversions. Transition substitution refers to a purine or pyrimidine being replaced by a base of the same kind; for example, a purine such as adenine may be replaced by the purine guanine. Transversion substitution refers to a purine being replaced by a pyrimidine, or vice versa; for example, cytosine, a pyrimidine, is replaced by adenine, a purine. Mutations can also be the result of the addition of a base, known as an insertion, or the removal of a base, also known as deletion. Sometimes a piece of DNA from one chromosome may get translocated to another chromosome or to another region of the same chromosome; this is also known as translocation. These mutation types are shown in Figure 14.21. Choices: - produced or spontaneous - accelerated or spontaneous - accelerated or random - induced or spontaneous A:
induced or spontaneous

Q: Q: Endothermic and exothermic reactions differ in whether the products or reactants store more of what? Read this paragraph and choose the correct option from the provided answers: A: The energy is stored in the bonds of the products as chemical energy. In an endothermic reaction, the products have more stored chemical energy than the reactants. This is represented by the graph on the left in the Figure below . In an exothermic reaction, the opposite is true. The products have less stored chemical energy than the reactants. You can see this in the graph on the right in the Figure below . Choices: - Motion energy - Thermal energy - Kinetic Energy - chemical energy A:
A: chemical energy

Question: Q: Species divergence often, but not always, occurs because of what type of barrier between species? Read this paragraph and choose the correct option from the provided answers: Sympatric Speciation Can divergence occur if no physical barriers are in place to separate individuals who continue to live and reproduce in the same habitat? The answer is yes. The process of speciation within the same space is called sympatric speciation; the prefix "sym" means same, so "sympatric" means "same homeland" in contrast to "allopatric" meaning "other homeland. " A number of mechanisms for sympatric speciation have been proposed and studied. One form of sympatric speciation can begin with a serious chromosomal error during cell division. In a normal cell division event chromosomes replicate, pair up, and then separate so that each new cell has the same number of chromosomes. However, sometimes the pairs separate and the end cell product has too many or too few individual chromosomes in a condition called aneuploidy (Figure 18.14). Choices: - emotional - visible - language - physical A:
Answer: physical

*Question*
Q: Mammals are endothermic vertebrates that have four limbs and produce what type of eggs? Read this paragraph and choose the correct option from the provided answers: Mammals are endothermic vertebrates that have four limbs and produce amniotic eggs. Defining traits of mammals are fur or hair and mammary glands. Mammals are noted for the many different ways they can move and their specialized limbs. Choices: - gymnoic - umbilical - epithelial - amniotic A:
**Answer**
amniotic

Q: Q: The metacarpophalangeal joints in the finger are examples of what kind of joints? Read this paragraph and choose the correct option from the provided answers: Figure 38.30 The metacarpophalangeal joints in the finger are examples of condyloid joints. (credit: modification of work by Gray's Anatomy). Choices: - fibrous - saddle - hinge - condyloid A:
A: condyloid