A scientist is studying trace fossils of an early mammal. Which type of information can be learned from studying trace fossils? Choose the correct answer.

a. how many teeth the mammal had

b. the structure of the mammal's skeleton

c. information about the behavior of the mammal

d. how the mammal is related to modern mammals

Can someone me with this and tell me what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens