Answer: b is ineffective pointing lights on billboards and street signs upward
Answer:
The correct answers are statements a and b.
Explanation:
The clusters of cells can exhibit the capability of evolution if it fits into three conditions, that is, possessing the tendency of reproducing, variation in clusters and that variation need to be hereditary, and the clusters shall pass fitness, that is, clusters must be abundant in comparison to the single cells.
The given first statement indicates that clusters possess the tendency to reproduce by the process of fragmentation. Thus, it supports the hypothesis that the clusters possess the tendency to evolve. The second statement indicates that clusters are more fit, therefore, it also supports the hypothesis.
The third statement is contrary to the hypothesis. Therefore, it does not support the hypothesis. The fourth statement is in contrast to fitness, more abundancy shows more fitness. Therefore, it also does not support the hypothesis. Hence, the correct statements are a and b.
Answer:
The correct answer is option B.
Explanation:
Strict consensus algorithm is the most restrictive approach that includes only that components that are shared by all the members of the group. In the strict consensus tree only those trees would be considered shared clades by all the trees.
The clades must be exact same or replicated in all the trees in this type of algorithm to analysis of the phylogenetic group. A 100% threshold in support leads to the Strict consensus trees algorithm.
Thus, the correct answer is : option B.
Explanation:
Single circulation is less efficient as gill capillaries slow down the blood flow so the body receives blood at a low pressure which decreases the oxygen supply to the cells.
Double circulation is more efficient as blood at higher pressure especially in humans and mammals
In single circulation only venous blood passes through the heart.
In double circulation mixed or oxygenated or venous blood passes through the heart.
I think that would be B: Prairie dogs are an important source of food for many other species.
hope this helps. and please correct me if I'm wrong ^^