can someone help ASAP

Answer:

Option C. Competition happens because resources are limited.

Explanation:

When resources are limited in an ecosystem, the species compete with each other to come out as best among all.

As per the theory of natural selection, Darwin proposed that it is always the fittest of all that survive. By fittest he means the ones who are capable to compete and come out as the strongest among all to survive in a given ecosystem.

For Example - Male compete among themselves to attract the female. This is known as sexual selection.

Hence, option C is correct.

The student most likely got parrot fever from inhaling aerosolized bird droppings or secretions from green parrots, which served as the disease reservoir. This transmission method is typical for zoonotic diseases. Proper handling and hygiene can help prevent the spread of such infections.

The student likely contracted parrot fever (psittacosis), a zoonotic disease caused by the bacteria Chlamydia psittaci, which can be transmitted from birds to humans.

The disease reservoir in this scenario is the green parrots observed at the pet shop. The probable transmission method is through inhalation of aerosolized bird droppings or secretions that contain the bacteria.

Parrot fever typically presents with flu-like symptoms, including fever, headache, and respiratory issues. It's important to handle birds with care and ensure good hygiene to prevent the spread of zoonotic diseases like these.

Explanation:

Botanically, mosses are non-vascular plants

The Answer Is 27% . . . . . . . . . . . . .  The dots are so I can post the answer, because without a long reply I can't answer.

Answer:

27% .  

Explanation:

A (adenine) pairs with T (thymine) and has the same percentage. C (cytosine) pairs with G (guanine) and they both have the same percentage.  In this case, the percentage of T (thymine) is 23%.  So A (adenine) will also have 23%. This leaves the remaining percentage at 54% (100-46).  So G and C will have 27% each (totaling 54%).

the answer is A.) Monohybrid crosses

Answer:

All of these are included in the uniformitarian theories:

1) The Earth's crust has been formed by floods and materials derived from that.

2) The Earth's crust has been formed by current slow processes.

3) Erosion and deposition are currently very slow, but with the time, it affects in a huge way the environment.

4) Major catastrophic processes are possible. They are violent and sudden, and that's how they affect so much the planet.

The idea was that fertilizing the ocean and seas would lead to the in increase growth of phytoplankton population.

The oceanic plants do not release carbon dioxide into the air when they die because the sinks into the sea carrying with them the carbon dioxide for several centuries. This would then decrease the levels of carbon dioxide from the air as plants absorb carbon dioxide from the air during the process of photosynthesis.

Final answer:

Erwin Chargaff discovered the base pairing rules critical for DNA structure, which was confirmed by Watson and Crick through their double helix model, integrating Chargaff's rules with X-ray diffraction data.

Explanation:

Part A: Erwin Chargaff's major contribution to our understanding of DNA structure lies in his discovery of specific pairing rules, known as Chargaff's rules. He observed that in DNA, the amount of adenine (A) always equals the amount of thymine (T), and the amount of guanine (G) always equals the amount of cytosine (C). This finding was critical for deciphering the double helical structure of DNA.

Part B: James Watson and Francis Crick's research confirmed Chargaff's conclusions by incorporating them into the development of the DNA model. Utilizing the principle that A pairs with T and G pairs with C, alongside X-ray diffraction data from Rosalind Franklin, they proposed a double helix structure. In this structure, each strand of DNA is composed of a long chain of nucleotide pairs, with hydrogen bonds between A and T and between G and C, explaining Chargaff's observations and providing a physical mechanism for DNA replication.

Zoo-archaeology is the branch of archaeology dealing with the study of faunal remains which are the remains or the items left after the death of the animal. These items mainly consist of bones, chitin, scales, teeth, hair and sometimes proteins or DNA. The skin, muscles or other organs usually are not found as they get damaged and decompose over the time by decomposers, by physical or environmental agents. This causes problems to identify and interpret the significance from these faunal remains as these provide incomplete information.

The Moon's core is thought to have formed from a giant impact between Earth and a Mars-sized object. This event fragmented and mixed materials from both bodies, with the less dense splatter forming the Moon's smaller, metallic core composed mostly of iron, sulfur, and nickel.

According to this hypothesis, Earth was struck obliquely by an object roughly the size of Mars, sometimes referred to as Theia. This collision led to a violent mixing and scattering of material from both Earth and Theia, with the lower-density material coalescing to form the Moon. As a result, the Earth retained a higher density, with a thicker core, while the Moon developed a distinct crust, mantle, and a smaller metallic core mostly composed of iron, with some sulfur and nickel.

The Moon's core is estimated to be 600 to 800 kilometers in diameter, significantly smaller compared to Earth's. This hypothesis is supported by evidence including the moon rock samples gathered by astronauts, data from the GRAIL spacecraft, and studies conducted using seismometers during the Apollo missions. These findings suggest that the Moon's interior lacks a large metal core, has a crust depleted of water and volatiles, and shares similar oxygen isotope abundances with Earth, which supports the idea that it is made primarily of terrestrial mantle material.

Marcia is diagnosed with hypermetabolism.  One pathological cause of hypermetabolism is thyroid disorder (hyperthyroidism). It could also be caused by injury or infection in the body. There is no single treatment for the disorder since it is merely a symptom of an underlying problem. It could be managed by nutritional support coupled with pharmacological treatment such as diuretics and regular insulin.

Answer:

She is diagnosed with hypermetabolism.

Explanation:

Hypermetabolism is metabolism at an excessive or increased rate and it is characterized by the abnormal increase in basal metabolic rate. It can signal the issues like hyperthyroidism. It occurs generally after significant injury to the body and the most common causes in the institutions and hospitals are burns, sepsis, traumas, infections surgery, bone marrow transplants etc. Its cause and location can be detected by PET scan. The symptoms includes anemia, sudden weight loss, fatigue, elevated heart rate, excessive sweating etc. It is itself a symptom and not an independent disease, treatment firstly requires attention to the underlying disease. The symptoms will subside, once the underlying cause is remedied.

Answer:

The answer is D. They break rocks and transport them to new locations.

Explanation:

Weathering is the physical process in which a breakdown or breakage occurs in the rock, but without affecting its chemical or mineralogical composition, while the erosion of the rocks is the process that refers to the movement or transport of the material, in contrast to the alteration and disintegration of the rocks. It is one of the main factors in the rock cycle.

Answer: B

Answer:

the answer is B

Explanation:

Answer:

mitochondria

Explanation:

The correct answer is option c) Vacuole because it is common in plant cells but rare in animal cells.

Vacuoles are membrane-bound organelles found in plant cells, as well as some fungal and protist cells. They are large, fluid-filled sacs that perform various functions, including storage of water, nutrients, and waste products, maintaining turgor pressure, and supporting the structure of the cell.

While animal cells may contain small vacuole-like structures called vesicles, they typically lack the large, central vacuole characteristic of plant cells. Therefore, vacuoles are much more abundant and prominent in plant cells compared to animal cells.

The incorrect options are:

a) ribosome: Ribosomes are present in both plant and animal cells. They are responsible for protein synthesis and are essential organelles found in all types of cells.

b) mitochondria: Mitochondria are found in both plant and animal cells. They are responsible for cellular respiration, producing energy in the form of ATP. While there may be some structural and functional differences between plant and animal mitochondria, they are present in both types of cells.

d) lysosome: Lysosomes are membrane-bound organelles containing enzymes responsible for intracellular digestion and waste removal. While lysosomes are more prevalent in animal cells, they are also found in some specialized plant cells, particularly those involved in defense and recycling processes. Therefore, while lysosomes may be rarer in plant cells compared to animal cells, they are not entirely absent.

The correct question is :

Which structure is common in plant cells but rare in animal cells?

a) ribosome

b) mitochondrion
c) vacuole
d) lysosome

The terms 'living' and 'biotic' are used in biology, each with distinct meaning. 'Living' refers to organisms that demonstrate the characteristics of life, while 'biotic' refers to all biological components, living or dead, within an ecosystem.

The terms living and biotic are often used interchangeably in biology, but they carry subtle differences. When we say 'living', we are typically referring to anything that exhibits all characteristics of life - growth, reproduction, metabolism, response to environment, and evolution. For example, animals, plants, and microorganisms.

However, the term 'biotic' is broader and not limited to only living organisms. It encompasses all biological factors in an ecosystem, including organisms, their residues, and their influences on each other. Biotic factors include living organisms (like plants and animals), dead organisms, and components produced by organisms (like waste products).

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A type of biotechnology that would a dairy farmer use to mate the cows at his farm with genetically superior bulls to produce offspring that give high-quality milk is, that artificial selection because offspring with desirable traits are produced.

Biotechnology may be defined as a group of technologies that deal with biological systems, living organisms, or parts of this to develop or create different products.

Human interference always leads to the production of desirable traits. This process is known as artificial selection.

This artificial selection always favors human needs. It is faster than natural selection and allows humans to develop organisms to their needs.

Therefore, the above example represents artificial selection because offspring with desirable traits are produced.

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The bread mold plant that has fine thread-like projections called hyphae and slender stems with knob-like structures that contain spores, which are haploid structures made in organisms that allow them to germinate and form new organisms.

A sporangium is defined as the enclosure in which spores are formed which may be unicellular or may be multicellular. All plants, fungi, and many other genera form sporangia at some point in their life cycle.

A sporangium is described as the structure in some plants and other organisms charged with making and storing spores which are haploid structures made in organisms that help germinate and form new organisms. These help organisms to reproduce.

Thus, the bread mold plant that has fine thread-like projections called hyphae and slender stems with knob-like structures that contain spores.

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