7th Science DCP 3 Review

Which of the following are considered mouth structures? (Check all the boxes that apply)

• beaks

• lips

• extended jaw

• elbow

Strawberries - hybrid

• Natural Selection:

• Selective Breeding:

Male peacocks - large tail feathers

• Natural Selection:

• Selective Breeding:

The process where organisms best fit for the environment are more likely to survive & reproduce

• Mutations

• Physiology

• Natural Selection

• Selective Breeding

The differences among a species, like different bird beaks, are called

• genes.\

• variations

• traits

• alleles

Moth adapted from white to black in color because of the pollution in their environment. There were a lot of dark trees in the area. What adaptation prevented moths from being eaten by birds?

• long necks

• camouflage coloring

• fast flying

• bright colors

Mudskippers are a species of fish which, over thousands of generations, have developed adaptations that allow them not only to survive outside of the water, but to actually travel from one water source to another. What environmental condition most likely led to these adaptations?

• Lower temperatures

• Frequent droughts

• Larger predators

• Increased precipitation

In a population of desert plants, the timing of their blooming varies greatly. Some bloom early in the morning, others at mid-day, and others after dark. What environmental pressure might be an advantage for those plants that bloom after dark?

• There is a decrease in water for root absorption

• There is an increase in herbivores that forage at night.

• There is a decrease in the strength of solar radiation

• There is an increase in the population of nocturnal pollinators

Students collected leaf samples. The students used the leaf identification key below to identify a leaf sample.

Based on the identification key, which type of tree is this sample from?

• Ginkgo

• Honey locust

• Horse Chestnut

• Black Maple

A labeled diagram of a fiddler crab is provided. Which of the following is an accurate observation of the structures of a fiddler crab? Fiddler crabs have -

• five pairs of walking legs on each side.

• an enlarged propodus on both front legs.

• a pair of eyes on stalks at the top of the body.

• two pairs or chelipeds for a total of four.