The simplest animals that are bilaterally symmetrical and triploblastic (composed of three fundamental layers) are the Platyhelminthes, which are the flatworms. true or false?

Answers

Answer 1

Answer: This statement is false. The simplest animals that are bilaterally symmetrical and triploblastic (composed of three fundamental layers) are the Platyhelminthes, however, it is not the flatworms, instead, it is the roundworms who are the simplest animals that are bilaterally symmetrical and triploblastic.

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Please help me quickly
Write an analogy that demonstrates how the lac repressor functions
During this process, the nucleus of a cell divides to form two nuclei that are identical to the original cell

2. What is a living organism? What are the main characteristics of organisms?

Answers

a living organism is used to describe something which displays all the charecteristics of living things.

what are the answers you can pick from

What types of carbon fixation is least common for plants in arid locations?

Answers

The answer is a C3 fixation.

Plants are located in different regions with a different condition, so they had to adapt the carbon fixation. There are three types of carbon fixation in plants - C3, C4, and CAM fixation. C3 and C4 plants open their stomata during the day while CAM plants open stomata during the night.
Plants in arid locations use CAM carbon fixation because of adaptation to water deficiency. In CAM plants, stomata are closed during the day and water loss is reduced. In the night when is colder, stomata open and carbon dioxide enters through stomata. In C4 carbon fixation, there is also adaptation to high temperatures thanks to enzymes that increase the rates of photorespiration, unlike the C3 fixation.

Answer:

A. C3!

Explanation:

Of the three louse vectored pathogens here, which is or are unable to invade the insects gut and penetrate into its body cavity to grow and reproduce?

Answers

Three Louse Vectored Pathogens

Explanation:

The body louse , Pediculus humanus corporis, is the vector of three human pathogens such as the operator of pandemic typhus and Borrelia recurrentis and Rickettsia prowazekii,

The specialist of backsliding fever and Bartonella quintana, the operator of channel fever, bacillary angiomatosis, endocarditis, incessant bacteremia, and constant lymphadenopathy.
Mite borne ailments can be related with high rate of illness and demise, particularly scourge typhus and backsliding fever, which can be lethal in up to 40% of patients.
The ailments are for the most part common in individuals living in neediness and packed conditions, for instance, vagrants and those associated with war circumstances.

F a material has a hardness of 8, it cannot be scratched by a material with a hardness of 7. True false

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True.

Same concept as nothing can scratch a diamond (hardness of 10) but a diamond can scratch anything.

Which explanation is most likely the reason for the evolution of a larger brain in humans? The size of the human brain increases the more it is used. A larger brain allows humans to solve complex problems. The size of the human brain has changed randomly over time due to mutations. A large brain increases humans’ ability to fight and survive disease.

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Across nearly seven million years, the human brain has tripled in size. The most likely the reason for the evolution of a larger brain in humans is that a larger brain allows humans to solve complex problems. Large, complex brains enable humans to process and store a lot of information and to interact with each other and with their surroundings better. The brain we now humans have is the largest and most complex of any living primate.

A large brain allows humans to solve complex problems. This, in turn, has allowed humans with bigger brains to survive better than humans with smaller brains.

What is the most likely effect a decrease of plant life in the biosphere would have on the atmosphere?a.
A decrease in plant life would have no effect on the atmosphere.
b.
A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.
c.
A decrease in plant life would cause carbon dioxide levels to decrease and oxygen levels to increase.
d.
A decrease in plant life would cause an increase in all gases in the atmosphere.

Answers

The answer is b. A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.

In the photosynthesis, plants take carbon dioxide and water and convert it into glucose and oxygen using the energy of sunlight. A decrease of plant life in the biosphere will increase a level of carbon dioxide in the atmosphere. Fewer plants mean fewer photosynthesis processes, and, thus, decreased levels of oxygen in the atmosphere.

The answer is B because without plants, the earth would have no natural way to recycle and generate oxygen and consume carbon dioxide

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