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SIZIF [17.4K]
2 years ago
10

Uma ameba que tivesse seu habitat no meio marinho, sendo isotônica em relação a esse meio, com certeza poderia dispensar em sua

estrutura a presença de:
A) membrana plasmática
B) pseudópodes
C) vacúolo contrátil
D) membrana celular
E) microtúbulos
Biology
1 answer:
Alex17521 [72]2 years ago
4 0
C) Vacúolo contrátil
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What effect would overfishing most likely have on a population of fish in a lake? A. cause a gene flow to occur in the populatio
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Overfishing would result in an bottleneck effect as large number of fish is removed from a population of fishes. The size of the population has an larger effect on the amount of genetic diversity. Larger the population greater the genetic diversity.Due to overfishing, population would become smaller resulting in reducing genetic diversity. So the answer is B.

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2 years ago
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What gland produces a secretion that causes fight-or-flight responses in effectors?a) adrenal medullab) salivatory glandc) repro
kupik [55]

Answer:

Adrenal medulla

Explanation:

Fight-or-flight or acute stress response is marked by physical changes, including nervous and endocrine changes, that prepare human or an animal to react or retreat. This response was first discovered by an American Physiologist, Walter Bradford Cannon.

In response to an acute stress, an area of the brain called AMYGDALA sends an emergency signal to the HYPOTHALAMUS, which acts like a command center and activates the body's sympathetic nervous system by releasing hormones. The sympathetic nervous system stimulate the adrenal medulla gland, triggering the release of CATECHOLAMINES (Epinephrine/adrenaline and Norepinephrine/noradrenaline) into the bloodstream.

This release induces several physiological changes in the body; The heart beats faster than normal; pushing blood to the muscles, heart and the vital organs, increased in blood pressure, blood sugar (glucose) are released into the bloodstream to give us the extra energy we need.

8 0
2 years ago
Loss of biodiversity matters not only with regard to mammals or other vertebrates, but also microbes. What statement below would
Romashka [77]

Answer:

B. Microbes may produce unique proteins useful in genetic research

Explanation:

Biodiversity refers to the diversity of living beings present on Earth. The biodiversity is a very important component of the ecosystem as these living organisms are interlinked with each other. Therefore, the loss of biodiversity will affect the ecosystem.

When we look at the biodiversity a layman considers the living organisms which can be seen with eyes but the diversity also exists at the level of the micro-organisms.

The man-made activities are not only harming the macroscopic but also microscopic organisms. The microbes play an important role in our life like these days they are used by the scientific community to study the genetic and related fields like molecular biology. The microbes produce proteins that are consumed by humans.

Thus, Option-B is correct.

8 0
2 years ago
The temporalis muscle originates on the __________ and inserts on the __________. a. zygomatic arch; temporal fossa b. temporal
Marta_Voda [28]
<h2>Answer is option "c"</h2>

Explanation:

  • The temporalis muscle embeds on the coronoid procedure of the mandible, with certain strands embeddings further down on the ventral edge of the masseteric fossa.  
  • The parallel pterygoid muscle embeds on the average surface of the mandibular condyle.  
  • The average pterygoid muscle embeds on the average and caudal surfaces of the rakish procedure of the mandible.  
  • The temporalis muscle is an enormous fan-molded muscle that begins on the transient bone of the skull and embeds on the coronoid procedure of the mandible.
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