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Anit [1.1K]
2 years ago
5

Which important event in Earth’s history occurred during the Jurassic period?

Biology
1 answer:
DIA [1.3K]2 years ago
5 0

Answer:

The start of the period was marked by the major Triassic–Jurassic extinction event. Two other extinction events occurred during the period: the Pliensbachian-Toarcian extinction in the Early Jurassic, and the Tithonian event at the end; neither event ranks among the "Big Five" mass extinctions.

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What bodies of water may be cold
AlexFokin [52]

Answer:

Flowing rivers and streams,Spring-fed bodies of water,Most open water except in tropical regions,

4 0
2 years ago
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When a neuron responds to a particular neurotransmitter by opening gated ion channels, the neurotransmitter is serving as which
GrogVix [38]

The question is incomplete as it does not have the options which are:

A) relay molecule

B) transducer

C) signal molecule

D) response molecule

Answer:

C) signal molecule

Explanation:

The transmission of signals in the neurons takes place in the form of electrical energy and chemical energy. The signals get transmitted in the form of electrical signals inside the neurons but when the signals have to be passed on to the next neuron on the pathway then the electrical signals get converted into the chemical signals.

The electrical signals cause the release of the chemical signals molecules called neurotransmitter from the synaptic vesicles in the presynaptic neuron and also opens the gated ion channels at the terminal. The neurotransmitter thus acts as a signal molecule in the transmission of a signal through neurons.

Thus,  C) signal molecule  is the correct answer.

8 0
2 years ago
Griffiths (1928) mixed heat-killed ‘s' bacteria with ‘r' bacteria and injected a mouse with both types of bacteria. as a result,
Talja [164]
The surviving R strain transformed into a living S strain.
8 0
2 years ago
Science when birds remain airborne and moving without flapping their wings, on what are they gliding?
Citrus2011 [14]

Soaring is a science when birds remain airborne and moving without flapping their wings. They are maintaining thrust and gliding downward but staying aloft

<h3 /><h3>Further explanation</h3>

Soaring birds is where the birds can maintain flight without wing flapping, because they using rising air currents. Many gliding birds are able to lock their extended wings by means of a specialized tendon. Some land birds such as vultures and certain hawks, sustain flight for long periods without flapping their wings.

For example soaring California Condor spreads its primary feathers so that each acts as a small, high-aspect-ratio wing. This reduces turbulence at the wingtips and helping the condor to stay aloft circling slowly in thermals.

Vultures have a low aspect ratio (ratio of length to width of the wing) which generally produce a lot of drag. Vultures overcome the problem of by flying with their primary feathers extended, creating slots between them. Each primary serves as an individual high-aspect-ratio wing. This high-aspect-ratio reducing wingtip turbulence and lowering the stalling speed of the wings. This helps vultures to circle in thermals, maintaining thrust by gliding downward, but staying aloft by sinking at a rate slower than the hot air rising.

<h3 /><h3>Learn more</h3>
  1. Learn more about Soaring birds brainly.com/question/4722417

<h3>Answer details</h3>

Grade:  9

Subject: biology

Chapter:  animals

Keywords:  birds

7 0
2 years ago
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With the endosymbiotic hypothesis in mind, what structure within modern-day chloroplasts is likely derived from the cytoplasm of
Liono4ka [1.6K]

The chloroplasts had inner membrane

Explanation:

The primitive photoautotrophs utilized hydrogen sulphide as the electron donor to perform photosynthesis for energy production.  

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Generations after generations led to the development of chloroplasts by the cyanobacteria due to this symbiotic relationships which developed into the chloroplasts.

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8 0
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