Rock sequences containing fossils are not always complete. Identify the statements that correctly describe the ratio of different stable isotopes of carbon (12C and 13C). -When measured in an animal tissue, the ratio of 13C to 12C can indicate the diet of that individual during life.
-Correct placement of fossils in time helps in documenting evolutionary relationships among species (phylogeny). -Correct placement of fossils in the environment where their living counterparts thrive helps us understand the factors that shaped that organism's evolution.
-The geological record at the Fayum Depression, Egypt, includes fossils dating from around 37 to 29 million years ago. CHAPTER 8 FOSSILS AND THEIR PLACE IN TIME AND NATU…
Does every part of an organism have the same chance of becoming fossilized? Choose the correct answers and their corresponding explanations. No. Hard parts of the body preserve because they have biologically deposited minerals. Soft tissues only rarely preserve because they are made of polymers that bacteria eat.
The earliest hominins arose in the late _____ epoch, a time during which the climate became drier and more seasonal. Evidence from the combined study of ancient soils and animal fossil remains in eastern Africa indicates that it was not until after about 6 million years ago that _____ settings began to dominate, suggesting that early hominins lived in woodland habitats.
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1. Buried fossils absorb radioactive isotopes from the surrounding burial environment.: electron spin resonance dating 2. An element decays radioactively at a known rate expressed as the half-life: radiometric dating 3. Iron-containing particles in sediment or molten rock will orient with the Earth’s magnetic field as it settles or cools: paleomagnetic dating 4.
Correct Answer(s): Fossils are the remains of once-living organisms, wholly or partially transformed into rock. The most common types of mammal fossils are bones and teeth. - 99% of the fossil record of mammals consists of their teeth and bones. Fossils provide an essential historical record for documenting and understanding the biological evolution of surviving and non-surviving lineages.
Fossils help us reconstruct plant and animal life in the past as well as their evolutionary processes, which can be either slow or rapid. Place in order the following images that demonstrate a possible evolutionary progression of a small population of snails.
Identify the conditions that are NOT likely to help preserve animal remains, making it more likely for them to become fossils. -acidic conditions . -the presence of scavengers in the vicinity. -long period of exposure on the surface.
Buried fossils absorb radioactive isotopes from the surrounding burial environment.
Soft tissues only rarely preserve because they are made of polymers that bacteria eat. Identify the correct statements about radiocarbon dating. -Radiocarbon dating is possible because a living organism stops incorporating new 14C into its body when it dies. -The parent-daughter elements are 14C → 14N.
No. Hard parts of the body preserve because they have biologically deposited minerals. Soft tissues only rarely preserve because they are made of polymers that bacteria eat.
Identify the conditions that are NOT likely to help preserve animal remains, making it more likely for them to become fossils. -acidic conditions . -the presence of scavengers in the vicinity. -long period of exposure on the surface.
Buried fossils absorb radioactive isotopes from the surrounding burial environment.
Soft tissues only rarely preserve because they are made of polymers that bacteria eat. Identify the correct statements about radiocarbon dating. -Radiocarbon dating is possible because a living organism stops incorporating new 14C into its body when it dies. -The parent-daughter elements are 14C → 14N.
No. Hard parts of the body preserve because they have biologically deposited minerals. Soft tissues only rarely preserve because they are made of polymers that bacteria eat.