The table below shows the depths at which an index fossil and three other fossils were found. Fossil Data
Fossil Depth (meters)
A 320
B 380
C 500
Index fossil 380

Which statement is correct?
The index fossil is the oldest fossil.
The index fossil is the youngest fossil.
Fossil A is the same age as the index fossil.
Fossil B is the same age as the index fossil.

Competition occurs between species when

6. in domesticated cats, the following are independently assorting: normal ears (t) is dominant to tufted ears (t); curved whiskers (c) is dominant to straight whiskers (c); the presence of six toes (s) is dominant to five toes (s); gene for hair length is an x-linked codominant. the three phenotypes for hair length are long (xhxh), medium (xhxh), and short (xhxh); medium is the heterozygous condition. given two parents: ttccssxhxh x ttccssxhy how many different gametes could be formed in the female cat with respect to these four traits? how many phenotypes are possible in the offspring from this mating?

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid