Answer:
The correct option is <em>B) Only triazine-resistant weeds survived and reproduced, so each year more pigweed was triazine-resistant.</em>
Explanation:
With time, the pigweed became resistant to triazine. As we know, according to the theory of natural selection only those species are able to survive and reproduce which are better adapted to live in an environment and adapt to the environmental changes. As the triazine- resistant weeds were better adapted survive and reproduce in the area, it began passing its resistant genes to offsprings. As a result, the population of the pigweed increases.
Answer:
Renal autoregulation.
Explanation:
Kidneys are the important organ that are involved in the process of excretion, maintains the body pH and regulates the level of salt in the body.
Renal autoregulation may be defined as ability of the kidney to maintain the constant glomerular filtration rate withou change in the blood pressure. No nervous or hormones are involved the renal autoregulation.
Thus, the answer is renal auto regulation.
Answer:
False
Explanation:
Prokaryotic cells lack a membrane enclosed nucleus and organelles.
Answer:
Yes, caffeine does provide following benefits to plants:
1) Caffeine provide benefit to the plant in a way by enhancement of pollination process. This occurs by preferential pollination of such flowers whose nectar contain a small quantity of caffeine.
2) Caffeine that is present in leaves and seeds is a way that kills insects thus protecting them from damage.
3) Caffeine increases the learning ability of bees. Bees sucking nectar, having even a low concentration of caffeine showed a long term memory.
Chloroplasts are organelles specialized for photosynthesis. Animals do not photosynthesize; therefore, they do not need chloroplasts.
