Why is the Tree of life so complicated

2 answers:

4 0

A basic source of the confusion is that in the course of evolution whole suites of genes have apparently been transferred sideways among the major branches. Among animals, genes are passed vertically from parent to child but single-celled creatures tend to engulf each other and occasionally amalgamate into a corporate genetic entity. It has long been argued that mitochondria, the tiny organelles that handle the energy metabolism of eukaryotic cells, were once free-living bacteria that were enslaved by an early eukaryote. Mitochondria still possess their own, bacteria-like DNA but many of their genes have emigrated into the eukaryotic cell's own DNA in the nucleus.

lora16 [44]3 years ago

4 0

It's not complicated it just has a lot of parts to it which makes it look so complicated

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Is the shaded a dominant or recessive trait?

postnew [5]

Answer:

Recessive

Explanation:

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3 years ago

Blood is carried by a(n) ___toward the heart

SVETLANKA909090 [29]

<h2>Answer </h2>

Blood is carried by a Superior and Inferior Vena Cava toward the heart

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Most veins transport deoxygenated blood through the tissues returning to the heart except pulmonary and umbilical vein that transfers oxygenated blood to the heart whereas arteries carry blood away from the blood. The main blood vessels aorta, superior vena cava, and inferior vena cava carry deoxygenated away from the heart to lungs while pulmonary veins carry the oxygenated that is oxygen-rich blood from lungs to the heart.

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Write a summary statement for saturated fats including whether they are solids or liquids at room temperature and whether they h

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3 years ago

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A class or broad-spectrum bacteriostatic antibiotics that are produced by soil organisms and inhibit protein synthesis by bindin

Anestetic [448]

A class of broad-spectrum bacteriostatic antibiotics that are produced by soil organisms and inhibit protein synthesis by binding to bacterial ribosomes is known as Chloramphenicol.

Chloramphenicol is a drug used to treat superficial eye infections such as bacterial conjunctivitis and otitis externa. It was also used to treat typhoid fever and cholera. Chloramphenicol is an antibiotic and belongs to the class of antibacterial agents that inhibit protein synthesis.

Chloramphenicol is used to treat serious infections in different parts of the body. It may also be given with other antibiotics. However, Chlorum phenicole should not be used to prevent colds, flu, other viral infections, sore throats, other mild infections, or infections.

Learn more about Chloramphenicol here: brainly.com/question/9670046

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2 years ago

Which statement regarding the mammalian heart is correct? A) In the adult heart, blood in the right chambers of the heart cannot

miss Akunina [59]

Answer:

In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs. (Ans. A)

Explanation:

In heart, heart muscle cells is responsible for the circulating the blood throughout the body. The heart contains four chambers, two upper called as atrium and two lower called as ventricle, 1 atrium and 1 ventricle present on both right and left sides of the heart.

Blood which is returning from other parts of the body and is no longer oxygen rich, enters from the top right chamber of the heart. Than this blood is pumped into the right vertical and through the pulmonary artery into the lungs for absorb more oxygen.This oxygen rich blood is then pumped into the top left chamber present in the heart, and then into the lower left chamber before being pumped out into the body from the aorta.

So, the answer is A.

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3 years ago