This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. a phylogenetic tree containing two main branches for evolutionary relationships among the animals. the first branch leads to drosophila. the second branch divides into two branches, 2a and 2b. branch 2a leads to lancelet. branch 2b divides into two branches: 3a and 3b. branch 3a leads to zebrafish. branch 3b divides into two branches: 4a and 4b. branch 4a leads to frog. branch 4b divides into two branches: 5a and 5b. branch 5a leads to chicken. branch 5b divides into two branches leading to human and mouse, respectively. this phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. select the correct statement.
(a)-a frog is the ancestor of both a mouse and a chicken.
(b)-the common ancestor of a human and a frog and the common ancestor of a mouse and a chicken lived at the same time.
(c)-the nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
Answers: 1
Biology, 22.06.2019 02:30
'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.
Answers: 3
Biology, 22.06.2019 09:10
Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10
Answers: 2
Biology, 22.06.2019 13:00
What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root
Answers: 1
Biology, 22.06.2019 13:00
How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans
Answers: 1
This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in deve...
Engineering, 20.02.2021 07:10
Chemistry, 20.02.2021 07:10
English, 20.02.2021 07:10
Social Studies, 20.02.2021 07:10
Mathematics, 20.02.2021 07:10
Mathematics, 20.02.2021 07:10
World Languages, 20.02.2021 07:10
Mathematics, 20.02.2021 07:10
Mathematics, 20.02.2021 07:10
Mathematics, 20.02.2021 07:10