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SashulF [63]
3 years ago
14

Modern cetaceans, the taxonomic group that includes whales, dolphins, and porpoises, evolved from land mammals. However, it has

only been within the past few decades that transitional fossils have been found that have shed light on cetacean hindlimb reduction. DNA data suggest that cetaceans are most closely related to Hippos, which are even-toed ungulates. Other even-toed ungulates include deer, pigs, camels, and cows. Which statement describes most accurately how the early cetacean,Pakicetus, fossil ankle bones shown in the figure supports the hypothesis that cetaceans are closely related to even-toed ungulates?
Biology
1 answer:
GenaCL600 [577]3 years ago
7 0

Answer:

Taxonomy may be defined as the branch of biology that mainly deals with the classification, arrangement and nomenclature of the organism. Organism are classified into the different taxa depending on their similarities and differences.

The shared characters may be defined as the characters that are share among the two lineages. As given in the question, the two humps that are present on the bottom end of  Pakicetus ankle bone is the shared distinguish character with the other ungulates that are even toed.

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During nitrogen fixation, nitrogen gas in the atmosphere is converted into a form that ____ can use. a plants b animals c humans
pychu [463]

Answer:

A. Plants

Explanation:

Nitrogen fixation is one of the processes involved in the NITROGEN CYCLE. It is the process whereby atmospheric nitrogen (N2) is converted into nitrogenous compounds such as ammonia, nitrates by certain nitrogen-fixing bacteria such as AZOTOBACTER.

The nitrogenous compounds which nitrogen fixation converts N2 into are in a form that PLANTS can use. Plants cannot utilize nitrogen gas, hence, the importance of this conversion into a form that plant can make use of.

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3 years ago
b cells are white blood cells that work by ___________________, whereas t cells attacks foreign invaders __________________.
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Answer:

your answer is b cells are white blood cells that work by producing antibodies, whereas t cells attack foreign invaders directly.

Explanation:

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6 0
2 years ago
Calculate the percentage ionization in these amino acid side chains at the ph values specified:
Margarita [4]

The <u>Henderson-Hasselbalch equation</u> and pKa can be used to determine the % ionization if it is assumed that the amino and carboxyl groups are not preventing ionization.

  1. aspartate at ph 5.4 = 98.3%
  2. glutamate at ph 11.8 = 100%
  3. histidine at ph 8.0 = 99%

Henderson-Hasselbalch equation- Henderson-Hasselbalch Equation to determine the pH of a solution. Knowing the pH of a solution is particularly significant for many chemical processes as well as for biological systems. The estimated pH value of a buffer solution may be determined using the Henderson-Hasselbalch equation.

pH- A solution's acidity or alkalinity may be determined based on the concentration of hydrogen ions in the solution, or pH. Typically, the pH scale runs from 0 to 14.

To know more about the Henderson-Hasselbalch equation, click on the below link,

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7 0
2 years ago
What prohibition lipids from being a really available energy correctly
Keith_Richards [23]

Fats must be broken down into fatty acids before being converted into glucose. Lipids are known as the back up energy source. They are used to make enzymes, hormones, and antibodies.

6 0
3 years ago
Cladograms (a type of phylogenetic tree) constructed from evidence from molecular systematics are based on similarities in
defon

Answer:

The correct answer is "mutations to homologous genes".

Explanation:

The missing options of this question are:

A) morphology.

B) the pattern of embryological development.

C) biochemical pathways.

D) habitat and lifestyle choices.

E) mutations to homologous genes.

The correct answer is option E) "mutations to homologous genes".

Modern cladograms do not use physical characteristics to establish evolutionary similarities among species. Modern cladograms are constructed from evidence from molecular systematics based on similarities in mutations to homologous genes. The more similar are the homologous genes, the less different their genetic sequences are, and are considered more closely related in their evolutionary tree.

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3 years ago
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