How do scientists use relative and absolute ages of rock layers to estimate the ages of fossils?

Which statement is true for cephalochordates? Notochord is present only in the larval stage; it is absent in adults. Notochord is present in the larval stage; it transforms to vertebrae in adults. Notochord is present throughout their lives.

Which of the following is a method used to prevent soil depletion? a-Adding fertilizers b-Planting grasses on slopes c-dune fences

Which category most accurately describes waste such as food wastes, cardboard, cans, bottles, yard wastes, furniture, plastics, metal, glass, and e-waste? ?

The stems of horsetails contain: A. spores B. utensils C. silica

What's the difference between jet streams and global wind belts

How will water volume, incline gradient, and temperature affect the energy of a stream?

Chemical messengers released within the tissues where they are produced

Which is more effective at creating atp aerobic or anaerobic?

If the data below were put into a bar graph, which animal would have the lowest bar on the bar graph? Number of Individuals in a Rocky Mountain Forest Organism Population Mountain lions 150 Bobcats 300 Coyotes 10,000 Deer 25,000 mountain lions

Tay-Sachs disease is inherited as an autosomal recessive disease. A couple has learned that they are both heterozygous carriers of the Tay-Sachs recessive gene. What is the probability that they will have a child with Tay-Sachs disease? A. 0%B. 50%C.