BIOLOGY HIGH SCHOOL

The chaparral biome has little biodiversity and is home to only a few well-adapted species.Please select the best answer from the choices provided

T
F

Answers

Answer 1
Answer:

Answer:

False

Explanation:

Chaparral biomes are found majorly in five regions of the world namely-  

Mediterranean Basin, southern California, South Africa, Chile, Australia.

All together they constitute only two percent of the land on earth. However, they contains nearly twenty percent of world’s plant diversity.  

This biome has varied geographical and topographical features ranging from extreme dry summers to wet winters which allows varied fauna species to flourish.

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A _____ is an autotroph or organism that can produce its own food while a ________ or heterotroph must eat another organism to obtain energy.producer, meat eater
consumer, producer
producer, consumer

Answers

the answer is producer and consumer

True or False. Action potential is generated and propagated along the sarcolemma and down the transverse tubules. Neurotransmitter is released and diffuses across the synaptic cleft and attaches to ACh receptors on the sarcolemma. Action potential triggers the release of Ca2 from the terminal cisternae of the sarcoplasmic reticulum.

Answers

Answer:

  • Option- True

Explanation:

  • Action potential is generated and propagated along the sarcolemma and down the transverse tubules. Neurotransmitter is released and diffuses across the synaptic cleft and attaches to ACh receptors on the sarcolemma. Action potential triggers the release of Ca2 from the terminal cisternae of the sarcoplasmic reticulum.

Answer:

False incorrect sequence.

Explanation:

1,Stimulus reaches the presynaptic  neuron membrane.

2.Calcium channels opens, and calcium ion diffuses into the neurone.

3.Vessicles of neurotransmitter acetycholine fused with the membrane of presynaptic neuron,   Neurotransmitter is released and diffuses across the synaptic cleft and attaches to ACh receptors on the sarcolemma.

4 The arrival of Action potential opens Na+ channels  in the sacolemma.

5, Na+ diffuses in causing depolarization  of the sacolemma,which  causes action potential to spreads along it length.

6. Action potential is generated and propagated along the sarcolemma and down the transverse tubules.

7. Action potential triggers the release of Ca2 from the terminal cisternae of the sarcoplasmic reticulum

8.Calciumion binds  to tropin, tropomyosin exposes the myosin-binding sites,cross-bridges is formed , and sacomere formed.

Changing a river into a lake is basically what a large dam does. One reason we do this to create reservoirs of fresh water. However, dams change the local ecosystem in a big way. What is one negative impact of building a dam

Answers

One negative impact of building a dam could be that it affects natural habitats of animals who live in and around the river. When you build a dam, the river's height becomes smaller because a huge amount of water becomes technically removed or blocked. This can affect animals such as fish or beavers or anyone who needs that water.

Which is an example of a competitive relationship? A.two male bighorn sheep smashing their horns over a mate

B.ticks feeding off the blood of a deer who is then harmed

C.Hawaiian bobtail squid glowing because of the bacteria living in its belly

D.cattle egrets feeding off the insects kicked up by the cape buffalo

Answers

Option A. two male bighorn sheep smashing their horns over a mate.

_____ are chemical mechanisms that start a reaction.Inhibitors

Activators

Centrioles

Vacuoles

Answers

Answer: Activators

Explanation:

Inhibitor is a substance that slows down or prevents a particular chemical reaction.

Activator is a substance that stimulates or initiates a chemical process.

Centriole is an organelle that helps in cell division, or make copies of themselves. Centrioles are only found in animal cells.

Vacuoles are strong central storage compartment in organisms.
To activate means to start, and activation energy starts the reaction, which means activators start the reaction. 

Answer: Activators

Mario requires a medication that will lower his blood pressure by relaxing the blood vessels and decreasing the blood volume. which class of medications would mario’s doctor prescribe?

Answers

The classification of dreugs that relax the blood vessels and decrease the blood volume are called: vasodilator medications. Examples of vasodilator medications are: nitroglycerin and minoxidil.

Answer: Vasodilator

Explanation:

If a person is suffering high blood pressure then the pressure inside the blood vessels increases because of vasoconstriction. Vasoconstriction is a condition in which the diameter of the blood vessels decreases and blood pressure increases.

In this case, vasodilators are given to the patients which helps in increasing the diameter of the blood vessels so that the pressure inside the blood vessels decreases.
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