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Dimorphism is the occurence of the existence of two forms, in the case of sexual dimorphism the existence of two distinct types of a individual. The dimorphism among fungi is the capacity to convert between two specific morphological forms, like hyphae and yeast, the Ascomycota phylum have dimorphic organism. The dimorphism in fungi can happen depending of environmental condictions or situations, like an yeast in cold temperatures turning into mold.

To be considered as fit for evolution processes, a species must be able to adapt in its environment and with capacity to reproduce sucessfully. Ambrosia, for example, is an invasive species. It has the abillty to promote accelerated evolution due to its adaptibility to its environment. Zea mays is an excellent species for genetic analysis. Quercus also has evolutionary potential because of its physiological characteristics.

The pressure would be changed to 4 atm in the machine to bring 500 ml of air into the lungs.

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Answer: The answer to this would be heat and radiation

Explanation: radiation would probably be the best answer

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Being a migratory mammal, the zebra moves to several herds as it acquires newer alleles from other populations.

Taller trees result from the fight for sunlight, which may benefit particular alleles. New alleles may be produced from DNA when a snake's DNA is altered to make it deadly. Buffalo rushed across the grass, picking random alleles.

The size of a population's gene pool is assumed to have some bearing on its capacity for adaptation and evolution. For instance, a population's potential for future adaptability to shifting environmental conditions may be increased by a broad and diversified gene pool.

Genetic variety can be increased by new genes and alleles being created as a result of gene duplication, mutation, or other events.

When individuals leave their family unit or herd to join other populations, this is known as gene flow in animals. New alleles are introduced into populations when people move in and out.

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Answer:

1. B

2. D

3. A

4. C

Explanation:

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What happens when a change in the DNA of an egg or sperm is not repair will depend on the location of the mutation. This means that whether the changed DNA region is a gene, a regulating sequence or "junk" DNA, the cell can survive or not. In case it survives, the replaced nucleotide may not altere the protein it codifies, resulting in a silent mutation, or it can cause altereations in the functioning even though not being lethal.

If number 1 is the single strand within the nucleus, it is mARN or messenger ARN. mARN has the genetic information needed to make proteins and carries this information from the DNA nucleus of the cell, to the cytoplasm where proteins are made.

Answer: C

Explanation:

A way deforestation can be prevented could be with socialization campaigns that help more people know, for example, the impacts these practices have upon the wildlife. The solution in specific countries can vary in the sense that different governments implement different practices and depend on the forest's resources differently.

In the core of cells, we can find the nucleus, which controls many of the cell functions and contains our DNA, that is found in chromosomes, thread-like structures made up of packaged DNA. The DNA, in turns, carries genes, sequences of nucleotides responsible for a product, which can be either an RNA molecule or a protein.

To complete both parts of the questions we can say that: meiosis is the type of cell division used to form the gamete cells, the process of meiosis produces four haploid cells that contain a single copy of each chromosome, being four cells with 23 chromosomes (structure carrying genetic information found inside the nucleus of a cell) each in the case of humans. About the second part of the question that is talking about mutations, the only statement that is not true is that all the mutations are harmful.

The observation which best supports the claim that Elysia chlorotica is capable of photosynthesis is number 4. The ability to photosynthesize doesn't mean it won't be able to eat other food sources when abailable, but that it will be able to survive and grow in abscense of food sources if it is exposed to light, as light is necessary to obtain the energy for the process of photosyntesis.

It is true that, Despite the fact that the complexity of animal nervous systems varies, their nerve cells are still remarkably similar.

Nearly all multicellular animals have nerve systems, but their complexity varies greatly. Sponge and the tiny blob-like placozoan and mesozoan organisms are the only multicellular animals without a nervous system. A diffuse nerve net makes up the nervous systems of ctenophores (comb jellies) and cnidarians (such as anemones, hydras, corals, and jellyfish). With the exception of echinoderms and a few worm species, all other animals have a nervous system that includes a brain, a central cord (or two parallel cords), and nerves that radiate from the brain and central cord.

The nervous system's most fundamental roles are to direct an organism's movement and to influence its surroundings (such as through pheromones). Signals are sent from one cell to another or from one part of the body to another to accomplish this. Signals that travel to muscle cells trigger the activation of muscles and signals that travel to endocrine cells triggers the release of hormones into the bloodstream or other internal fluids are the sources of the output that the nervous system produces.

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Africa and North America have moved apart since 2001 by a total of about 21 inches.

This comprises of about seven landmasses on the earth which is usually very large and discrete and comprises of different countries. Examples include Africa, Asia, North America, South America etc.

Continents in the world such as Africa and North America move apart since 2001 at a rate of 1 inch per year. Since we were told that it occurred in 2001 then the total years in which it occurred is 21 then =

1 inch × 21 = 21 inches.

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A cross between a purple flower (BR) and a red flower (RR) will result to:

BR - 50% purple flowers

RR - 50% red flowers

Purple flower is a cross between blue and red flower which is a dilution of two dominant traits (blue and red color) resulting to a new heterozygous phenotype (purple flower).

Primates have long growth and development periods because: they have larger brains and higher intelligence as compared to other organisms.

Primates is the order of the class Mammalia. They are different and more advanced from all the other animals. They have more intelligence, five-digit feet and hand, more vision power than smelling power and slower growth. Their life span is also very large.

Brain is the most complex and largest organ of the body. It is the master regulator of all the actions of the body. The brain is divided into left and right hemispheres. There are three sections of the brain: forebrain, midbrain and hindbrain.

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The case the exersice tells is an example of how introduced subtances to a particular environment have a negative impact on the species' health, as states the C answer option: "factors in the environment can change the characteristic

An example of predation is D) Chickens peck at the ground and eat many types of insects.

Predation is a type of biological interaction in which a predator feeds on its prey. In the above example, chickens are the predators that make insects their prey.

In order for an ecosystem to be healthy, predators are essential. There is more food available for the survival and success of healthy prey species after predators take away vulnerable prey, such as the young, old, sick, injured, or very young. Predators also aid in reducing the size of prey populations, which slows the spread of illness.

What are the types of biological interaction?

Mutualism, commensalism, competition, and predation are the four basic forms of two-way biological interactions between species found in ecological webs (which include herbivory and parasitism).

Therefore, D) Chickens pecking at the ground and eating many types of insects is an example of predation.

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Activation energy is the energy required to form or break the bonds of reactant molecules (option C).

Activation energy of a chemical reaction is the energy required to initiate a reaction.

For example, the flame from the fuse of a firecracker provides a small initial amount of energy, after which the explosive reaction proceeds by itself, releasing a considerably larger quantity of energy.

The activation energy of a chemical reaction is strictly required to make a reaction occur i.e. conversion of reactants to products.

Therefore, the energy needed to break the chemical bonds of a reactant molecule is the activation energy.

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Protozoans like paramecium have protoplasmic invasions called gullets, which aid in these species' food uptake and digesting.

Protists have eukaryotic cells, as opposed to bacteria, these organisms feature cytoplasmic membrane-bound components as well as a nucleus that is membrane-bound.

Another kind of protists is zooflagellates, they resemble animals and use flagella to move. Flagella are whip-like organelles that rapidly spin and help an organism move through the water like a boat's propeller.

The majority of zooflagellates have one to eight flagella that aid in movement, protists do not belong to a monophyletic group of creatures.

Therefore, The paramecium's gullet functions as the buccal cavity where food is transformed into food vacuoles for digestion.

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Answer: D Osmosis​

Explanation: Water moves into and out of cells by osmosis

Answer: A.

Explanation: A ligament is a fibrous tissue that connects bone to bone. Usually holds to serve as a structure together and keep them stable.

Introduction to Biology: Biomolecules

In the options, they are listing the four more abundant elements in living beings: carbon (C), hydrogen (H), nitrogen (N), and oxygen (O). Given that all of them are essential to forming the molecules found in living beings, we need to check their chemical properties, because they are telling us that is an element that can form long chains.

• Hydrogen, has only 1 electron and can form one bond at a time, so it cannot form long chains

• At normal conditions, ,Oxygen, form molecules of only 2 oxygen atoms (O₂), not long chains.

• Nitrogen, is a similar case to oxygen because at standard temperature and pressure it forms a diatomic gas (N₂)

• Carbon ,has ,4 atoms that can form covalent chemical bonds,, which allows it to form ,polymers, at, standard temperatures.

This means the correct answer is a) carbon.

The phase of the cell cycle in which chromosomes replicate is the S phase.

This is referred to as the series of events that take place in a cell during the process of reproduction an d in this scenario , the parent cells divide which gives rise to two daughter cells. Chromosome on the other hand is a thread like structure which is made up of DNA.

The S phase occurs between G₁ phase and G₂ phase and is an important process in mitosis as the DNA in the nucleus are synthesized and the traits present are usually passed to the offspring.

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Kuru is a Transmissible spongiform encephalopathy which was formerly common among the Fore people of Papua New Guinea. This disease is caused by a prion, i.e., a protein that can trigger other proteins in the brain to fold abnormally. The abnormally folded proteins in the brain cause neurodegeneration which ultimately lead to death. The main symptom of the Kuru disease is the loss of coordination and control over the muscle movements. The transmission of Kuru was because of a ritual in which Fore people consumed body parts of their family members just after their death. The Fore people stopped to eat human meat in the early 1960s, causing the kuru epidemic to decline dramatically. It is not certainly known if the last kuru victim died in 2005 or 2009.

Atropine is a prescription medicine that is used to treat the symptoms of low heart rate (bradycardia), reduce salivation and bronchial secretions before surgery, or as an antidote for overdose of cholinergic drugs or mushroom poisoning. Atropine may be used alone or with other medications.

Biologic evolution is a scientific theory supported by the pshysical evidence of fossils. It explains the changes of living organisms from the first cell to the generation of the many different ways of living forms that exist, including the mechanisms that could have led to them.