BIOLOGY HIGH SCHOOL

An anthropologist discovers the fossilized heart of an extinct animal. The evidence indicates that the organism's heart was large, well-formed, and had four chambers, with no connection between the right and left sides. A reasonable conclusion supported by these observations is that the animal wasA) most closely related to mammals.B) most closely related to fish.C) most closely related to reptiles.D) most closely realted to athropods and molluscs. E) most closely related to amphibians.

Answers

Answer 1
Answer:

Answer:

Option A, most closely related to mammals

Explanation:

Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.  

All mammals and fish have four chambered heart. The right and left sides of the chambers have restricted entry and hence remain intact from each other

Hence, option A is correct

 

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Which of these is NOT an aquatic reptile group? plesiosaurs pterosaurs ichthyosaurs nothosaurs

Answers

The answer is Pterosaurs. Pterosaurs do not belong to the aquatic reptile group. These reptiles are winged or flying prehistoric reptiles. Plesiosaurs, Ichtyosaurs and Nothosaurs are marine reptiles. Unlike them, pterosaurs are warm-blooded reptiles. 

Although pterosaurs are reptiles, they are not marine reptiles. The answer is pterosaurs.

Which best describes mitochondrial DNA (mtDNA)?O Mitochondrial DNA is the same as nuclear DNA.
O Mitochondrial DNA is inherited through the father.
Mitochondrial DNA can be traced for generations.
O Mitochondrial DNA requires large amounts for testing.

Answers

I think the answer is A. The same as nuclear DNA but i’m not positive

escherichia coli is the scientific name of a bacterium. what category of classification is escherichia?

Answers

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Gracie squeezed some grapes and kept the juice in a vessel for five days at room temperature. On the fifth day she found that the juice tasted sour and appeared frothy. What caused this change?

A. alcohol termination of the grape juice by anaerobic bacteria
B. lactic acid fermentation of the grape juice by anaerobic bacteria
C. alcoholic fermentation of the grape juice by aerobic bacteria

Answers

"lactic acid fermentation of the grape juice by anaerobic bacteria" is one among the following choices given in the question that shows what caused this change. The correct option among all the options that are given in the question is the second option or option "B". I hope that the answer has helped you.

Answer:

lactic acid fermentation of the grape juice by anaerobic bacteria

Explanation:

Which kingdom is known to contain organisms that have cells with no cell walls?

Answers

The answer is that the Animal kingdom's organisms have cells with no cell walls. The cell wall of Prokaryotes is murein, the cell wall of some Protoctists is polysaccharide, the cell wall of Fungi is chitin, the cell wlall of plants is cellulose, and the cells of animals do not have cell walls.

Final answer:

The kingdom Animalia, which belongs to the Eukarya domain, is known for having organisms with cells that do not have cell walls. Other kingdoms, like Plantae and Fungi, typically have cell walls.

Explanation:

The kingdom known for containing organisms with cells that lack cell walls is the Animalia kingdom which exists within the Eukarya domain. In the classification of life, three main domains exist: Bacteria, Archaea, and Eukarya. The first two mainly include prokaryotic organisms which usually have cell walls. The Eukarya domain includes four kingdoms: Animalia, Plantae, Fungi, and Protista. Among these, it's typical for Plantae and Fungi to exhibit cell walls. Conversely, Animalia comprised of animals, do not have cell walls surrounding their cells. Their cells are surrounded by a plasma membrane which offers flexibility and aids in movement and interaction with the environment. This characteristic is one of the key distinguishers of the Animalia kingdom from other kingdoms.

Learn more about Kingdoms and cell walls here:

brainly.com/question/22034051

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Which of the following is correctly paired with its function?Sensory somatic nervous system—controls skeletal muscles
Autonomic nervous system—creates voluntary response to stimuli
Parasympathetic nervous system—controls body response to emergency
Sympathetic nervous system—brings body to homeostasis
I know that C and D are mixed up definitions. The sympathetic nervous system controls the response to emergency situations and the parasympathetic brings the body back to homeostasis.
I'm also pretty sure the autonomic nervous system controls involuntary responses, not voluntary.

Answers

Answer:

The correct answer would be Sensory somatic nervous system—controls skeletal muscles.

Somatic nervous system is a part of peripheral nervous system which controls the movement of skeletal muscles or voluntary movements.

It connects the skeletal system with central nervous system.

It comprises of two types of nerves:

  • Afferent nerves: These are also termed as sensory nerves and carry stimulus from receptors to the central nervous system.
  • Efferent nerves: These are also known as motor nerves and they carry commands or response from the central nervous system to the effector organs. It leads to the contraction of the muscle and thus results in voluntary movement.

The below flow chart would help you better in understanding the classification of nervous system.
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