*Question*
Q: Fishes were the earliest example of what subphylum, and jawless fishes were the earliest of these? Read this paragraph and choose the correct option from the provided answers: Fishes Modern fishes include an estimated 31,000 species. Fishes were the earliest vertebrates, and jawless fishes were the earliest of these. Jawless fishesthe present day hagfishes and lampreyshave a distinct cranium and complex sense organs including eyes, distinguishing them from the invertebrate chordates. The jawed fishes evolved later and are extraordinarily diverse today. Fishes are active feeders, rather than sessile, suspension feeders. Jawless Fishes Jawless fishes are craniates (which includes all the chordate groups except the tunicates and lancelets) that represent an ancient vertebrate lineage that arose over one half-billion years ago. Some of the earliest jawless fishes were the ostracoderms (which translates as "shell-skin"). Ostracoderms, now extinct, were vertebrate fishes encased in bony armor, unlike present-day jawless fishes, which lack bone in their scales. The clade Myxini includes 67 species of hagfishes. Hagfishes are eel-like scavengers that live on the ocean floor and feed on dead invertebrates, other fishes, and marine mammals (Figure 15.37a). Hagfishes are entirely marine and are found in oceans around the world except for the polar regions. A unique feature of these animals is the slime glands beneath the skin that are able to release an extraordinary amount of mucus through surface pores. This mucus may allow the hagfish to escape from the grip of predators. Hagfish are known to enter the bodies of dead or dying organisms to devour them from the inside. Choices: - grasses - ferns - mammals - vertebrates A:
**Answer**
vertebrates

*Question*
Q: What is the name for the process of charging an object by touching it with another charged object? Read this paragraph and choose the correct option from the provided answers: Charging an object by touching it with another charged object is called charging by conduction. By bringing a charged object into contact with an uncharged object, some electrons will migrate to even out the charge on both objects. Charging by conduction gives the previously uncharged object a permanent charge. An uncharged object can also be charged using a method called charging by induction . This process allows a change in charge without actually touching the charged and uncharged objects to each other. Imagine a negatively charged rod held near the knob, but not touching. If we place a finger on the knob, some of the electrons will escape into our body, instead of down the stem and into the leaves. When both our finger and the negatively charged rod are removed, the previously uncharged electroscope now has a slight positive charge. It was charged by induction. Notice that charging by induction causes the newly charged object to have the opposite charge as the originally charged object, while charging by conduction gives them both the same charge. Choices: - charging by connection - charging by convection - charging by transfer - charging by conduction A:
**Answer**
charging by conduction

*Question*
Q: What type of traits are features that are passed from one generation to the next called? Read this paragraph and choose the correct option from the provided answers: The theory of evolution by natural selection means that the inherited traits of a population change over time. Inherited traits are features that are passed from one generation to the next. For example, your eye color is an inherited trait. You inherited your eye color from your parents. Inherited traits are different from acquired traits , or traits that organisms develop over a lifetime, such as strong muscles from working out ( Figure below ). Choices: - generational traits - genetic traits - familial traits - inherited traits A:
**Answer**
inherited traits

*Question*
Q: Food is chemical energy stored in what? Read this paragraph and choose the correct option from the provided answers: Food is chemical energy stored in organic molecules. Choices: - typical molecules - oxygen molecules - DNA molecules - organic molecules A:
**Answer**
organic molecules