BIOLOGY HIGH SCHOOL

New fossil primates are recovered in a stratigraphic layer of volcanic ash that includes fossil molars of a pig species known to have become extinct about 30 million years ago. Identify the fossil dating methods that are appropriate to use in determining the age of the fossil primates. Correct Dating Methods inquizitive

Answers

Answer 1
Answer:

Answer:

The correct dating methods will be:

  • radiopotassium dating
  • biostratigraphic dating

Explanation:

The primate fossils presented in the question above must be submitted to the dating processes known as radiopotassium and biostratigraphic so that the age of these fossils can be determined as accurately as possible.

Radiopotassium dating is based on the half-life of potassium, which is equal to 40 years. The term half-life refers to the number of years it takes for half the number of atoms of the radioactive isotope to be destroyed. Thus, radiopotassium dating measures the amount of potassium present in a fossil and relates this amount to the half-life of potassium, thus being able to calculate the age of the fossil.

Biostratigraphic dating, on the other hand, allows the age of a fossil to be determined by being compared with the age of another fossil and the physical and structural composition that these fossils have.

Therefore, to determine the age of primate fossils, radiopotassium dating would first be used in some fossils. These would be used as a model during biostratigraphic dating, allowing confirmation of the age of other fossils.

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Endocrine glands are responsible forA. controlling body temperature.
B. regulating body activities.
C. stimulating an immune response.
D. keeping the brain bathed in fluid.

Answers

The best answer is B. Endocrine glands are responsible for regulating body activities. Endocrine glands release chemicals that are called hormones which help the body to function properly. the endocrine system regulate many internal processes. 

Cactus spines are modified.

1.) Leaves
2.) Stems
3.) Branches

Answers

Answer: The correct answer is 1) leaves.

Cactus is a desert plant that possesses thick, enlarged, and leafless stems that are covered with sharp spines or spikes. These sharp cactus spines are the modified leaves that provide them an extra advantage for surviving in desert.


Cactus spines provide protection against predator (as they are very sharp) and prevent the loss of water by reducing the flow of air near the cactus and giving them some shade.

Cactus spines are modified 1) LEAVES.

Cactus spines occur in clusters in the axil of leaves. Cactus spines are also known as modified bud scales, which also are modified leaves. The spine primordia is produced at the base of the axillary bud's shoot apical meristem; the location where leaf primordia also grows.

Though cactus spines are modified leaves, they do not contain any of the cells or tissues characteristics of leaves when they mature. Cactus spines consist of just a core of fibers surrounded by sclereid-like epidermis cells. When the spines mature, all the cells in the spines are dead. The only living cells are found at the base of the cactus which enables the spine to continue growing.

Multicellular plants and animals have organs to perform specific functions. What do eukaryotic cells have to perform specific functions?

Answers

Since multicellular plants and animals have organs that perform specific functions, eukaryotic cells have organelles to perform their specific functions. 

Answer:

organelles

Explanation:

look it up its correct

the structures responsible for carrying information all over your body are? A. Muscles B. Alveoli C. Neurons D. Blood Cells

Answers

The correct answer to the question which is stated above is letter  c, Neurons.


Neurons are the structures responsible for carrying information all over your body.
> The nervous system's nerve cells or neurons, are specialized to carry "messages" through an electrochemical process

in a well-fed state, brain cells use which one of the following compounds circulating in the blood stream almost exclusively as an energy source?

Answers

Glucose is virtually the sole fuel for the human brain, except during prolonged starvation. The brain lacks fuel stores, thus requires a continuous supply of glucose. It consumes about 120 g daily which corresponds to an energy input of 420 kcal (1760 KJ), accounting for some 60% of the utilization of glucose by the whole body in the resting state. 

Select the layers of Earth that are completely solid. A. crust B. inner core C. outer core D. lower mantle E. asthenosphere

Answers

Answer:

The correct answer would be A. crust.

The crust is the outermost layer of the earth which is composed of different types of rocks such as sedimentary, metamorphic, and igneous rocks.

It is completely solid and can be broadly classified into two types: continental crust and oceanic crust.

The thickness of the oceanic crust is about 5 km to 10 km. It is primarily composed of basalt, gabbro, and diabase.

The thickness of the continental crust is around 30 km to 50 km.  

The crust forms lithosphere along with hard and upper mantle.
Hi There! :)

Select the layers of Earth that are completely solid. A. crust B. inner core C. outer core D. lower mantle E. asthenosphere

A.Crust 

B.inner core

D. lower mantle

Hint: Outer core is made out of a liquid! :D
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