CHICAGO (Reuters) - Lab experiments on a new strain of the H7N9 bird flu circulating in China suggest the virus can transmit easily among animals and can cause lethal disease, raising alarm that the virus has the potential to trigger a global human pandemic, researchers reported on Thursday.
D the formation of specicies
Answer:
Faciliated diffusion, which requires a carrier protein but no cellular energy. The energy for this process is provided by the concentration gradient of the substance being transported.
Answer:
During meiosis, an event known as chromosomal crossing over sometimes occurs as a part of recombination. In this process, a region of one chromosome is exchanged for a region of another chromosome, thereby producing unique chromosomal combinations that further divide into haploid daughter cells.
I think the answer is b
so yeah that'll be B' option
hope its help
