Question

can you answer these

Sophie says dolphins and sharks look very similar, so they must be related. Jake disagrees, saying DNA evidence has shown that dolphins and other aquatic mammals are actually more closely related to the ancestors of modern hippos. Who is correct using the modern system of classification?
Sophie is correct because dolphins look more like sharks than like hippos.
Jake is correct because classification is based on evolutionary relationships.
Both are correct because traditional and modern classifications can overlap.
Neither is correct because neither is taking into account both the traditional and modern systems

What is likely to happen to a healthy population that is experiencing exponential growth?
It will eventually reach its carrying capacity.
It will experience a population crash.
It will go extinct in the near future.
It will continue to grow exponentially indefinitely.

When the body receives stimuli, which structure typically processes the stimuli?
sensory nerve cell
motor nerve cell
brain
meninges

Mintu needs to determine the missing ecosystem in the set.

intertidal zone, open ocean, ________, ________

Which ecosystems best complete the set?

wetland, stream
neritic zone, wetland
stream, coral reef
coral reef, neritic zone

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. There has been much debate about the classification of these creatures. Some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards. The data equally support both cases.

A rynchosaur is shown.

Which statement best explains how to draw a cladogram that includes the rynchosaur?
Draw the cladogram for amphibians.
Draw the cladogram for reptiles.
Draw two cladograms, both showing the traits, and leave it as a hypothesis.
Draw two cladograms, both showing the traits, and have scientists vote.

Answer 1

1) Jake is correct because classification is based on evolutionary relationships (DNA shows dolphins are mammals related to hippos, not sharks).

2) It will eventually reach its carrying capacity.

3) Brain.

4) Coral reef, neritic zone (both are marine ecosystems that belong with intertidal and open ocean).

5) Draw two cladograms, both showing the traits, and leave it as a hypothesis (present alternative phylogenetic hypotheses until more data resolve the placement).