D) A & B
it protects the seed against any damage or harmful weather conditions and also helps in dispersal of the seed through different means.
Answer:
Both cones and rods participate in dark adaptation, slowly increasing their sensitivity to light in a dim environment. Cones adapt faster, so the first few minutes of adaptation reflect cone-mediated vision.
The answer is <span> b) chromosomes replicate
DNA replication occurs before mitosis. So, duplicated chromosomes are already present in mitosis. They are connected by centromeres. During different phases of mitosis, spindles are formed and pull chromosomes toward the opposite poles of the cell so centromeres must split.</span>
The crayfish have its nerve cord on the ventral side rather than on the dorsal side. The ventral side is under the Crayfishes' exoskeleton, as opposed to the dorsal side where the exoskeleton is . If it is attacked it will be from the dorsal side and the nerve cord would be snapped easier. The function of the nerve cord is that if it gets attacked by a predator they will go for the top and it will still be able to move.
Thank you for posting your question here at brainly. Below is the solution for the above problem. I hope it helps.
period of orbit at 26000 AU
<span>P = a^(3/2) </span>
<span>= (26000)^(3/2) = 4,192,374 years (Earth)</span>