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3 years ago

HELP SOS PLEASE !!!!! (ONLY CORRECT ANSWERS PLEASE)

Biology

1 answer:

Phantasy [73]3 years ago

5 0

Answer:

1- Option A) describes an index fossil. Trilobite existed for a short time, but was abundant and lived in many locations.

2- Option B) Continents were once joined and have since drifted apart.

Explanation:

1) Fossils are animal and vegetable rests found in different strata of sedimentary rocks. Sedimentary layers deposit chronologically, so they are used to reflect history. They keep in each layer some of the forms of life that inhabited that area in the past. These fossils turn to be very useful while dating ages. The term Index fossils refer to those fossils that only existed in a given era or geological period during evolution.

Index fossils must:

• Be easily recognizable and distinguishable from all the other fossils

• Have lived in a relatively short geological period

• Present a wide geographic distribution

• Have lived in different sedimentary basins

• Appear in different types of rocks

• Be abundant

A) Trilobite existed for a short time, but was abundant and lived in many locations. The species accomplish the requirements. It is easily recognizable, had a wide geographic distribution, was abundant, and lived for a short time.

2) The tectonic plates theory states that there is a continual movement of the crust. It explains the movement of the different plates and their directions and interactions. The continental drift theory explains how these movements have been taking place since millions of years ago. When continents were together in a unique continent, many species used to inhabit it. When plates started to separate, they took some of these species that got apart by the ocean. Some species were already dead and fossilized, while some other organisms died during continental drift and got fossilized after the divergence. The existence of the same fossils, placed in the same layers and of the same age, suggests that they used to inhabit the same area and died during the same time, meaning that continents were together when they got fossilized.

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faust18 [17]

Answer: D) The lizard and the snake are secondary consumers.

Explanation:

Producers are organisms that, simply put, produce their own food. All photosynthesizing plants are considered to be producers. Animals cannot be producers.

Primary consumers eat producers.

Secondary consumers eat primary consumers.

Tertiary consumers eat secondary consumers, and so on.

The lizard eats a fly, which is a primary consumer. This makes the lizard a secondary consumer.

The snake eats a mouse, which is a primary consumer. This makes the snake a secondary consumer.

A) is incorrect because the hawk is a tertiary consumer.

B) is incorrect because grass is a producer, not a consumer

C) is incorrect because the lizard is a secondary consumer

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timofeeve [1]

Nuclear power plants use the nuclear fission reaction to release energy and generate electricity through energy conversion. Take the pressurized water reactor nuclear power plant as an example to illustrate its working principle.

In the pressurized water reactor, a large amount of heat is generated by the self-sustaining chain fission reaction of the nuclear fuel nucleus. The coolant (also called the heat carrier) brings the heat in the reactor to the steam generator and transfers the heat to the working medium, water. The main circulation pump then delivers the coolant back to the reactor for recycling, thereby forming a circuit called the first circuit. This process is also the energy conversion process of nuclear fission energy converted into thermal energy.

The working medium on the secondary side of the U-tube outside the steam generator is vaporized by heat to form steam. The steam enters the steam turbine to expand work, and converts the heat energy released by the steam enthalpy into the mechanical energy of the rotor of the steam turbine. This process is called thermal energy conversion to mechanical energy. The energy conversion process. The steam that has done work is condensed into condensed water in the condenser and returned to the steam generator to form another circulation loop called the second loop. This process is called the energy conversion process of converting thermal energy into mechanical energy. The rotating rotor of the steam turbine directly drives the rotor of the generator to rotate, so that the generator emits electric energy, which is an energy conversion process that converts mechanical energy into electrical energy.

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Brrunno [24]

Answer:

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Which term refers to fibrous connective tissues that connect bone to bone and provide static and dynamic stability as well as in

Tom [10]

Answer:

Ligament

Explanation:

The ligament is a primary connective tissue which connects one bone to another bone in the skeletal system of humans. The ligaments are present is the ankles, knee, elbows and shoulders and in other joints.

The ligaments if broken cannot be regenerated and provides many functions like it provides guidance, input to the nervous system and provides stability to the bones and facilitates the movement.

Thus, Ligament is the correct answer.

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Ilia_Sergeevich [38]

Answer:

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