Which of the following is a TRUE statement regarding the skeletal system? There are 28 vertebrae that cover the spinal cord. There are 14 pairs of rib bones that make up the thorax. There are 10 major facial bones. There are 3 components to the sternum bone.

Answers

Answer 1

Answer: Out of the statements presented regarding the skeletal system, the last one would be the only true statement which says that there are 3 components to the sternum bone.

For the number of vertebrae that cover the spinal cord, there are around 31 segments that have it. For the pairs of ribs, there are 12 pairs of it. There are also 14 major facial bones. As for the components of the sternum bone, there are 3 components which are as follows: the manubrium, the body, and the xiphoid process.

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A what is a threadlike structure made of dna and protein

Answers

chromatids......then chromosome !!!

Answer:

chromosomes

Explanation:

k12 answer by the way

The evolutionary advantage depicted by the rabbit in the picture isA) mimicry.
B) warning coloration.
C) adaptive radiation.
D) protective coloration

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The evolutionary advantage depicted by the rabbit in the picture is D) protective coloration, since it changed its color to white, in order to adapt and protect itself.

D) protective coloration sssssssssssssssssssssssssss

The CFTR receptor is used to move chloride ions out of a cell by active transport. This is an example of: A reaction coupled with the hydrolysis of ATPA reduction reaction Equilibrium
A reaction coupled with the production of ATP
An oxidation reaction

Answers

The movement of chloride ions out of a cell by the CFTR receptor involves a reaction coupled with the hydrolysis of ATP.

Step 1: The CFTR (Cystic Fibrosis Transmembrane Conductance Regulator) receptor utilizes active transport to move chloride ions out of a cell. This process involves a reaction coupled with the hydrolysis of ATP (adenosine triphosphate).

ATP is a molecule that stores and provides energy for cellular processes. In this context, ATP is used to fuel the active transport of chloride ions against their concentration gradient.

Step 2: Active transport mechanisms like the CFTR receptor require energy to move substances against their natural direction of movement. In this case, the hydrolysis of ATP provides the necessary energy for the movement of chloride ions out of the cell.

ATP is enzymatically broken down into ADP (adenosine diphosphate) and inorganic phosphate, releasing energy that drives the active transport process.

This coupling of the reaction with ATP hydrolysis ensures that the movement of chloride ions is achieved against the concentration gradient, maintaining cellular homeostasis and contributing to various physiological processes.

Understanding these cellular mechanisms is vital for comprehending how cells regulate ion concentrations and maintain proper functioning.

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The CFTR receptor facilitates the active transport of chloride ions out of a cell, coupling this process with the hydrolysis of ATP. The correct option is A.

This means that as chloride ions are moved against their concentration gradient, the energy released from ATP hydrolysis powers the transport. This mechanism ensures efficient ion movement and is essential for maintaining proper ion balance in various tissues, such as the respiratory epithelia.

It's not an equilibrium process, as it requires constant energy input. Moreover, it's not a reduction or oxidation reaction, but rather a prime example of active transport coupled with ATP hydrolysis for cellular energy utilization. The correct option is A.

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Which of the following statements is false? A.)Sunlight is the energy source for plant photosynthesis.
B.) Chlorophyll is contained in organelles called chloroplasts.
C.) A by-product of photosynthesis is carbon dioxide.
D.)Roots have tiny root hairs that maximize the plant's ability to absorb water.

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C.) A by-product of photosynthesis is carbon dioxide. This Is the correct answer. A by-Product of Photosynthesis Is Oxygen.

14. Compare How do the skull and brain sizesof modern humans compare to the skulls ofearly primates, such as australopithecines?

Answers

Humans are members of the genus Homo . Modern people are Homo sapiens . However, we are not the only species of humans who have ever lived. There were earlier species of our genus that are now extinct. In the past, it was incorrectly assumed that human evolution was a relatively straightforward sequence of one species evolving into another. We now understand that there were times when several species of humans and even other hominins were alive. This complex pattern of evolution emerging from the fossil record has been aptly described as a luxuriantly branching bush on which all but one twig has died off. Modern humans are that last living twig. Complicating this evolutionary history even more is the realization that our ancestors very likely mated successfully with members of other closely related species from time to time. As a consequence, our inherited gene pool was enriched by added genetic diversity. This sort of genetic mixing has recently been documented for Neandertals and early modern Homo sapiens living 40-60,000 years ago. It is also likely that there were genetic bottle necking events that periodically reduced our diversity. That largely accounts for the fact that despite our huge human population today, we are remarkably similar genetically compared to other primate species. It also explains why we are now the only surviving hominin species.

The striking similarities in appearance between the human genus Homo and our ancestors, the genus Australopithecus , is sufficient reason to place us both into the same biological tribe (Hominini ). Both genera are bipedal and habitually upright in posture. Humans have been somewhat more efficient at this mode of locomotion. Like australopithecines , early humans were light in frame and relatively short. They were only about 3 ft. 4 in. to 4 ft. 5 in. tall (100-235 cm) and weighed around 70 pounds (32 kg) The evolution of larger bodies occurred later in human evolution. The differences between australopithecines and early humans are most noticeable in the head. Humans developed significantly larger brains and relatively smaller faces with progressively smaller teeth and jaws. In addition, humans became ever more proficient in developing cultural technologies to aid in their survival, while the australopithecines did not.

Late australopithecine Early transitional human

The immediate ancestors of early humans were most likely late australopithecines. At present, the leading contender for that ancestral species is Australopithecus garhi or possibly Australopithecus africanus.

There may have been one or possibly two species of the first humans living in East Africa--Homo rudolfensis and Homo habilis . The few rudolfensis fossils that have been found are somewhat earlier, dating about 2.4-1.6 million years ago, while the more common habilis remains are around 1.9-1.4 million years old. Rudolfensis apparently was a bit taller and relatively larger brained on average. However, many paleoanthropologists consider the differences to be too slight to warrant a separate species designation. Some have suggested that rudolfensis were males and habilis were females. As a result, they classify them both as a single species--Homo habilis. That is the approach taken in this tutorial.

How are frog bones similar to trees?

Answers

The bones of the frog have similarities to trees. The frog's bones form a growth ring every year, in which it is what the Scientists find out about the frog's age (by counting it.) The age of trees can also be find in its rings (inside the trunk.)

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