Kangaroos are mammals that lack a placenta. therefore, they must have an alternate way of supplying the developing embryo with

a. carbon dioxide
b. enzymes
c. nutrients

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.

Will mark branliest. the theory of plate tectonics was developed with the contribution of scientists from many different disciplines. which of the following is a contribution from geophysicists?

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.