What evidence allowed biologists to conclude that classification of the tree of life required a three domain system?

What evidence allowed biologists to conclude that classification of the tree of life required a three-domain system? The phylogenetic tree of the three domains of life is based on sequence data for rRNA and other genes. The kingdom Protista is obsolete because it contains members of how many other kingdoms?

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic?

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of sequence homology? Dogs and wolves shared a common ancestor very recently.

Which of the following is true of all horizontally oriented phylogenetic trees in which time advances to the right?

Which of the following is true of all horizontally oriented phylogenetic trees, in which time advances to the right? The common ancestor represented by the rightmost branch point existed more recently in time than the common ancestors represented at branch points located to the left.

Which of the following are the best examples of homologous structures which of the following are the best examples of homologous structures?

The correct answer is (B) Bat wing and human hand. Homologous structures are similar structures that arise through divergent evolution from a common…

Who suggested the classification of organisms for convenient studies in biology?

This naming system given by Carolus Linnaeus is being practised by biologists all over the world. This naming system using a two word format was found convenient.

What are the 3 domain system of classification?

The three-domain system is a biological classification introduced by Carl Woese et al. in 1990 that divides cellular life forms into archaea, bacteria, and eukaryote domains. The key difference from earlier classifications is the splitting of archaea from bacteria.

Which is strong evidence supporting the impact hypothesis for the extinction of the dinosaurs See Section 25.4 page 512?

Which is strong evidence supporting the impact hypothesis for the extinction of the dinosaurs? See Section 25.4 (Page 512). D – Presence of an element abundant only in asteroids and meteorites supports the hypothesis that an asteroid impact occurred at the K-P boundary, around the time dinosaurs went extinct.

Which of the following are true about phylogenetic trees?

Which of the following is true about phylogenetic trees? They’re a way of visualizing how different species are related. Branch length always corresponds to how long a species has been alive. The species to the right are more evolved than the species to the left.

What is true about phylogenetic trees?

A phylogenetic tree is a diagram that represents evolutionary relationships among organisms. Phylogenetic trees are hypotheses, not definitive facts. The pattern of branching in a phylogenetic tree reflects how species or other groups evolved from a series of common ancestors.

Why are homologous structures evidence of evolution?

Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features). Similarities and differences among biological molecules (e.g., in the DNA sequence of genes) can be used to determine species’ relatedness.

Which statement best describes how homologous structures evolve?

Which statement best describes how homologous structures evolve? A basic structure inherited from a common ancestor may evolve different variations in different species. Which of the following scenarios best represents an example of punctuated equilibrium?