Ans.
In a evolutionary or phylogenetic tree, the nodes represent common ancestral species of the descendants, which are represented by the tips of branches, arising from the nodes.
According to the given evolutionary tree, all organisms are evolved from a common ancestor, represented by the last node, which was present about 13 million years ago. Hence, the option 1). is correct.
The second last node is showing a common ancestor to gorilla, chimpanzee, bonobo, and human, which was evolved to different species about 6 million years ago. Hence, the option 3). is correct.
Thus, the correct options are 'option (1). and option (2).'
Answer:
The sample treated with RNase
Explanation:
According to this question, a novel virus was found which was capable of killing mice when injected into them and capable of making a nonvirulent virus to be virulent by transforming them.
After heat killing the novel virus, different samples were treated with either an RNase, a DNase, or a Proteinase. If the novel virus uses double-stranded RNA as its genetic material, the sample treated with RNase will no longer be capable of transforming the non-virulent strain. This is because RNase is a catalytic enzyme that degrades RNA, hence, the RNA will no longer be present to transform.
Answer:
B
Explanation:
Amylase breaks down starches and glycogen into simple sugars. This is why when you eat a cracker, there is a slight sweet taste to it. The amylase in your saliva is breaking down in the cracker and converting it into sugars
I hope this helps!
Explanation:
Structure:
These are temporary cytoplasmic projections and can appear for sometime and disappear at another. So, these don't have any specific structure.
Function:
These provide help in motility and are also used as a tool for capturing prey and phagocytosis.
