You have defined the problem as a need for heat shields to be stronger. You have designed and tested a new heat-shield prototype. What should be the next step in your process? A. Analyze the test results, and then update your design. B. Communicate your findings to all of NASA and the public, C. Identify the criteria and constraints of the project.​

answer; i believe the correct answer is ( proteins );

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

not always but somethings can be reproduced in a laboratory.