Changes in the trilobite exoskeleton can be attributed to ____.
a.
changing environments
c.
inter-species mating
b.
competition for survival
d.
both a and b

Answer:

a

Explanation:

The right answer is it can be attributed to similarities among organisms in proteins and nucleic acids (especially in their coding regions in their genome).

Genomes consist of coding regions, which correspond to genes, and non-coding regions. The coding part is the one that gives the proteins that are involved in the structure and metabolism of the individuals. if two individuals have a similar protein-giving genome, then they will probably have the same structure and metabolism.

Answer:

The time passed would be an independent variable and the height of the lentil seedling would be the dependent variable.

Explanation:

The actual variable a researcher sets out to measure during the course of a research is the dependent variable. It is measured to determine how its response to variation in the independent variable.

The independent variable is the one that is usually manipulated or changed during the course of a research or experiment. The effect it creates is determined by measuring the dependent variable.

Hence, in a graph of growth rate of a plant, a growth measuring factor (such as height, number of leaves, branching, etc.) serves as the dependent variable while time will serve as the independent variable.

Therefore, in the case of Paisely, the height of the lentil seedling would be a dependent variable and the time passed would be the independent variable.

The option that does not contribute to Earth's uneven warming is 'The Sun is farther from Earth during the winter.' The other options relate to how sunlight interacts with Earth's surface and atmosphere, which are true contributors to the uneven warming of the Earth.

The student asks which factor does not contribute to the uneven warming of Earth's surface. The incorrect option among those provided is b. The Sun is farther from Earth during the winter. While it's true that Earth's orbit is elliptical and the distance from the Sun changes slightly over the year, this variation is not significant enough to cause the seasons or affect the uneven warming of the Earth's surface. Instead, the uneven warming is mainly due to the other three factors: different surfaces warming at different rates, the Sun's rays hitting the surface at different angles, and different surfaces retaining energy differently. The way the Sun's rays strike Earth varies depending on factors like the angle and duration of sunlight, which are influenced by Earth's tilt and position in its orbit around the Sun. During summer, for example, the Sun's rays hit the Earth more directly, causing more intense and concentrated warming.

1. The right answer is Solvent

The term "solution" would not be applicable here because it designates the solute + the solvent ".

In chemistry we prefer to use the term solvent rather than liquid.

The solubility of a compound can be defined as follows: a maximum amount (g or mole) of solute dissolved in 1 liter of saturated solution according to precise conditions of temperature, nature of the solvent and the solute.

2. The right answer is Reactant.

During a chemical transformation the atoms of the reagents combine in different ways to form the products but no atom disappears or does not appear so the total mass does not change.

During a chemical transformation, the total mass of the disappeared reagents is equal to the total mass of products formed.

Answer:

#1 - The answer would be Solvent

#2 - The answer would be Reactants

Raccoons belong to the family Procyonidae. This family is part of a hierarchical taxonomic classification system used in biology to organize and understand relationships between organisms.

The raccoons belong to the family Procyonidae. This classification is part of the taxonomic hierarchy, which categorizes living organisms in a ranked structure from broad to specific. The hierarchy includes the domain Eukarya, followed by the kingdom Animalia, the phylum Chordata, class Mammalia, and then progresses to the order Carnivora. Within this order, we find the family Procyonidae, which includes the genus Procyon, and finally the species lotor, signifying the common raccoon with the scientific name Procyon lotor. Taxonomic classification is important in biology as it helps scientists organize and understand the relationships between different organisms. Each level of classification from kingdom down to species is referred to as a taxon.

Nucleic acid give the best biochemical evidence of evolution. Thus option C is correct.

Nucleic acids are the main information-carrying molecules of the cell, and, by directing the process of protein synthesis, they determine the inherited characteristics of every living thing.

Nucleic acids are the most important macromolecules for the continuity of life. They carry the genetic blueprint of a cell and carry instructions for the functioning of the cell.

The more similar their DNA is, the more similar their proteins will be and the more closely related the organisms are likely to be. Thus, scientists use biochemical evidence to establish how organisms have evolved.so, option C is correct.

Learn more about nucleic acid here:

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Answer: D. Scientific theories summarize patterns found in nature.

A scientific theory is a model that explains the facts about nature on the basis of observations, experimentation and reasoning. A scientific theory can be proved by scientific methods involving procedures, measurements, observations and evaluation of results.  Therefore, a scientific theory validate the facts of nature and summerizes patterns found in nature.

Final answer:

The angle supplementary to an angle measuring 165° is 15°.

Explanation:

The angle supplementary to an angle measuring 165° is the angle that, when added to 165°, will result in a sum of 180°. Since supplementary angles add up to 180°, we can subtract 165° from 180° to find the measure of the supplementary angle.

180° - 165° = 15°.

Therefore, the angle supplementary to the angle measuring 165° is 15°.

Answer:

it's C

Explanation:

Answer: Carnivore, consumer

Explanation:

The carnivores are the animals that feed on the smaller organism for their energy. They can be as small as a bird and as bid as a lion.

Consumers are the organism that feed on the producers for their energy needs. Here, the bird is omnivores that feed on insect as well as on plants for their energy needs.

A bird feeding on insect is an example of consumer, carnivore.

The right option is; c. fish and berries

Omnivores are animals that obtain their energy and nutrients by feeding on both plants (like herbivore) and animals (like a carnivore). Diets of omnivores include both plant foods such as fruits, vegetables, grains, and animal foods (meats, fishes, insects). Examples of omnivores are humans, bear, pig, chimpanzee and rodents.

The theory of special creation predicts that there should be no nonfunctional structures in perfectly adapted organisms, contrasting with evolutionary theory which supports adaptation and change over time.

The theory of special creation predicts that there should be no nonfunctional structures in organisms perfectly adapted to their environment. This viewpoint is based on the belief that each species was created individually and perfectly suited to its environment from the outset, making the idea of vestigial organs or structures unnecessary according to this theory. In contrast, evolutionary theory, supported by evidence such as the presence of vestigial structures and fossils indicating gradual changes in species over time, suggests that organisms do change and adapt through natural selection and shared ancestry.

Answer: The correct answer is C) Chromosomes.

Genes can be defined as the segments of DNA ( deoxyribonucleic acid) that code for a particular protein. The protein formed corresponds to a particular trait of the organism. ( like eye color, hair color).

Genes are located on the chromosomes ( thread like structures that are made up of DNA).

Thus, option C) is the right answer.    

The type of vegetation that would you expect to find on newly formed volcanic islands is the abundance of lichens.

Vegetation may be defined as a process that significantly involves the collection of plant species and the ground cover they provide. These plants are togetherly found in a particular area or habitat.

Lichen belongs to the family of pioneer species that first colonize in barren soil. There is a lack of nutrients on newly formed volcanic islands still, but lichens are able to adapt themselves by secreting some chemicals in the infertile or barren soil and making it somehow nutrient rich.

Therefore, the type of vegetation that would you expect to find on newly formed volcanic islands is the abundance of lichens.

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Where and when was the research published?

Answer:

c

Explanation: i got it right

Answer:

The correct answer is the option: heredity

Explanation:

Hello!

Let's solve this!

Hereditary diseases are uncontrollable. Since they depend solely on the genes we have, inherited from our parents.

This is a very very important factor is cardiovascular disease, more specifically.

We conclude that the correct answer is the option: heredity

Answer: A) The rate of photosynthesis would decrease and less glucose would be produced.

Explanation: Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen.

Photosynthesis is the process used by plants, algae and certain bacteria to convert energy from sunlight and turn it into chemical energy in the form of glucose which is used a s a source of energy by many organisms.

[tex]6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+6O_2[/tex]

Thus decreasing the amount of sunlight would decrease the rate of photosynthesis and less glucose will be produced.