Which of the following provides the best comparison between fish and birds?

they are both ectothermic, but fish have streamlined bodies and birds are bipedal.

they are both vertebrates, but fish are ectothermic and birds are endothermic.

they both lay eggs, but fish are jawless and birds have gizzards.

they both have two-chambered hearts, but fish have scales and birds have feathers

One group of reptiles, characterized by the fossil ark metal x

Select all the correct answers. lactobacillus is a bacteria that live inside humans. these bacteria live on the nutrients from our bodies. they to keep our gut clean and healthy. s. typhi is a bacteria that enter our bodies through contaminated food. this bacteria causes infections in the body. based on this information, which two statements about the association between these bacteria and humans are true? a. lactobacillus shares a parasitic relationship with humans. b. s .typhi shares a parasitic relationship with humans. c. both lactobacillus and s. typhi share a parasitic relationship with humans. d. both lactobacillus and s. typhi share a mutualistic relationship with humans. e. lactobacillus shares a mutualistic relationship with humans, and s. typhi shares a parasitic relationship multiply chrse

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?