What are the spikes on a crocodile called?

A student identified a wet-mount slide of a microorganism from a pond water sample as a protist. Which observable characteristic would lead to the student's conclusion?

Which group of fish do scientists believe amphibians evolved from?

A scientist is investigating mutations. She observes a mutation where one or more nucleotides are inserted into a sequence of DNA. The scientist claims that this insertion mutation will affect genetic variability.

Why is it rare for the soft parts of an organism to become a fossil? A. The soft parts take a long time to decay. B. The soft parts can be eaten by other animals. C. The soft parts cannot be buried in sediment. D.

Know the 5 cardiovascular factors influencing blood pressure?

The process of chemical cycling is known as a biogeochemical cycle because it a. takes places over a long period of time b. withdraws the chemical form the atmosphere as a gas c. absorbs the chemical involved from the sediment d.

What step first happens in DNA replication?

Why was Charles Darwin considered to be a revolutionary?

In addition to observing wind speed, wind direction, temperature, air pressure, and humidity meteorologists observe ...

What features of Therapsids suggest the group was transitional to reptiles and mammals?