Based on the model of eukaryotic cell cycle regulation shown in the figure, which of the following best describes the effect of a drug that blocks the production of the mitotic cyclin?

Answer:

The correct answer is - A. Growth 1, Synthesis, Growth 2.

Explanation:

The cell cycle has three important phases Interphase, M -phase and cytokinesis. Interphase is the laongest phase of eukaryotic cell cycle. This phase shows no observational change in the cell, however, it collects nutrients, generates protein and replicates DNA and prepare the cell for the M- phase.

Interphase has 3 phases G1, S, and G2 phase. G1 phase is the phase that collects nutrients and increase the size of the cell for the cell division. S phase or synthesis phase is the phase takes maximum time in cell divivon and acompanied by protein generation, duplication of the genetic material. G2 phase is preparatory phase that prepeare the cell before the cell enter in the M - phase.

Answer:

Carbon forms "covalent bonding"

"have low melting point".

"forms a variety of compounds".

Answer:

covalent bonding

generally in nonelectrolytes

low melting point

forms a variety of compounds

Explanation:

Drawing the Punnet square:

We se that the possible blood types for the children are: A, B and AB.

Answer:

It's because an organism's phenotype, or physical traits, are what truly decide whether it can reproduce and pass on its genotype to the following generation.

Because the phenotype of an organism represents the alleles that are actually expressed in that organism, natural selection affects that phenotype.

Explanation:

Answer:

Sensory neurons receive impulses and carry them from the sense organs to the spinal cord or brain. Interneurons connect sensory and motor neurons and interpret the impulse. Motor neurons carry impulses from the brain and spinal cord to muscles or glands. Draw and label the structure of a typical nerve cell.

Explanation:

The table is most likely to be comparing a community and an ecosystem. Thus, option B is correct.

When biotic and abiotic components are linked together by energy flow and through nutrient cycle it is called as an ecosystem. Ecosystem consist of the organisms and the physical environment they interact.

A community is said to be group of one or more species interacting in  the same geographical area at the same time. It is also known as biotic community or biological community.

Therefore, observation 1 shows community and observation 2 shows an ecosystem and option B is correct.

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1.) Specific anatomical characteristics of typical cervical, thoracic, and lumbar vertebrae:

- Cervical vertebrae: There are seven cervical vertebrae in the human spine, located in the neck region. They are smaller and more delicate than the thoracic and lumbar vertebrae. Cervical vertebrae have a bifid (split) spinous process and transverse foramina, which allow passage of the vertebral arteries and veins that supply blood to the brain. They also have small, oval-shaped vertebral bodies and relatively large vertebral arches.

- Thoracic vertebrae: There are twelve thoracic vertebrae in the human spine, located in the upper back region. They are larger and more robust than the cervical vertebrae. Thoracic vertebrae have long, downward-pointing spinous processes and costal facets for articulation with the ribs. They also have heart-shaped vertebral bodies that are larger than those of the cervical vertebrae, but smaller than those of the lumbar vertebrae.

- Lumbar vertebrae: There are five lumbar vertebrae in the human spine, located in the lower back region. They are the largest and strongest of the vertebrae. Lumbar vertebrae have short, thick spinous processes and large, kidney-shaped vertebral bodies. They also have broad, flat transverse processes and no costal facets, as they do not articulate with the ribs.

2.) Structure of an osteon:

An osteon (also called a Haversian system) is a cylindrical unit of compact bone tissue that forms the basic structural and functional unit of bone. It consists of concentric layers of bone tissue called lamellae, which are arranged around a central canal called the Haversian canal. The Haversian canal contains blood vessels and nerves that supply nutrients and oxygen to the bone cells (osteocytes) and remove waste products. The osteocytes are located in small spaces called lacunae, which are connected by tiny channels called canaliculi. The canaliculi allow the osteocytes to exchange nutrients and waste products with each other and with the blood vessels in the Haversian canal. The osteons are interconnected by perforating canals called Volkmann's canals, which allow blood vessels and nerves to penetrate the bone tissue and connect adjacent osteons. Together, the osteons form a strong and flexible matrix that gives bone its characteristic strength and resilience.

Acidic                                        

lemon juice.                            

normal rainwater.    

a solution with pH 6

a solution with higher concentration of hydrogen ions (H+) than hydroxide ions (OH).

Neutral

pure water

Basic

liquid soap

A solution with higher concentration of hydroxide ions (OH) than hydrogen ions (H+)

a solution with pH 12

a solution with pH 7

Note: Neutral solutions have an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-).

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Answer: primary succession pioneer species would include Lichens, fungi, bacteria, fireweed, grasses,and  alder.

Heterozygous means the individual has one copy of the recessive gene and one for the dominant gene. That means the genotype will contain one capital letter and one lowercase letter. In this case, which is complete dominance the dominant gene will manifest in the heterozygous form.

The correct answer is A. Gg-Green color

Answer:

As a nanobot the size of a red blood cell, I would have a very unique perspective on the human body. My first stop would be the heart, where I would witness the powerful pumping action that propels me and my fellow red blood cells through the blood vessels. As I travel through the arteries and veins, I would encounter a variety of different tissues and organs, each with their own specialized functions.

In the lungs, I would see the exchange of oxygen and carbon dioxide that occurs during respiration. I would also pass through the kidneys, where I would observe the filtration and removal of waste products from the blood. In the liver, I would witness the breakdown of toxins and the production of bile to aid in digestion.

As I continue my journey through the circulatory system, I would encounter the immune system in action, as white blood cells attack invading pathogens. I would also pass through the brain, where I would see the intricate network of blood vessels that supply oxygen and nutrients to this vital organ.

In my travels, I may encounter other nanobots like myself, programmed to perform specific tasks like repairing damaged tissues or delivering drugs to targeted areas of the body. It would be a fascinating and endlessly varied journey, full of wonders and challenges. But as a nanobot, my primary goal would always be to contribute to the health and wellbeing of the human host that I am privileged to serve.

Explanation:

Answer:

Vertebrate:spine Invertebrate:no spine

Explanation:

Answer:

Invertebrates are animals that do not have backbones. 95%-97% of the members of the animal kingdom are invertebrates such as sponges, jellyfishes, squids, and roundworms.

Vertebrates, on the other hand, are animals with a backbone or a vertebral column and are composed of six groups: mammals, birds, reptiles, amphibians, and fishes. Humans are members of the vertebrates family too but are sometimes exempted from the list when the discussion leans towards animals.

The wing of a bald eagle is homologous to the wing of a penguin. Homologous structures are structures that are of similar evolutionary origin.

Homologous structures are  described as anatomical features found in different species that have a common evolutionary origin. These structures may have different functions in different organisms, but they share a similar underlying structure and can be traced back to a common ancestor.

The wing of a bald eagle and the wing of a penguin are considered homologous structures because they both evolved from a common ancestral structure, even though they serve different purposes  which is flight in the case of the bald eagle and swimming in the case of the penguin.

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Answer:

One of the primary functions of carbohydrates is to provide your body with energy. Most of the carbohydrates in the foods you eat are digested and broken down into glucose before entering the bloodstream.

The two datasets show the sudden increase in population since the millennium.

Human population growth has been a matter of concern for several years. It is a known fact that human population has been growing at an unsustainable rate since the millennium especially in developing countries.

Essentially when we talk about the population of a place we talk about the number of people that live in that place. The more the number of people in a place the greater the population of a place and population have been increasing at astronomical rate in recent times.

Looking at the datasets, we can see that, the rate of population growth since sine the 1960s has increased so much and this is quite unsustainable and somehow accounts for the population explosion that is recently occurring in many parts of the world and is leading to many intervention programs.

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Answer:

heterozygous- Has different letters. E.g. Tt (different alleles for trait)

h0m0zygous- Has same letters. E.g. TT or tt (same alleles for trait)

Genotype- The letters that make up the individual. E.g. TT or Tt

Phenotypes- The physical characteristics of the particular trait. E.g. Tall or short

Explanation:

see answer.

Answer:

kinetic energy is the energy possessed by an object by virtue of its motion. potential energy is the energy possessed by an object by virtue of its position.

Explanation:

Answer:

exponential

Explanation:

The age of 16 of growth does this question describe

Answer: A

Explanation:

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water.

Answer:

Plant reproduction is the development of new offspring that can be achieved through sexual or asexual reproduction in plants. By the fusion of gametes, sexual reproduction creates embryos, resulting in offspring genetically distinct from the parent or parents. Asexual reproduction creates new individuals, genetically similar to the parent plants, without the fusion of gametes.

Explanation:

Answer:

He discovered all atoms contain tiny negatively charged subatomic particles or electrons with cathode ray tubes.

Explanation:

Answer:

The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to leave more offspring than their peers, causing the traits to increase in frequency over generations.

Explanation:

Answer:

B oxygen

Explanation:

When your body runs out of oxygen, or your other systems can't deliver oxygen to your muscles quickly enough, your muscles convert the available glucose into lactic acid instead.

Lactic acid fermentation is the energy source used by muscle cells when their supply of oxygen runs low.

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Answer:

B. The materials used in building cities retain heat

Explanation:

The metropolitan region where the heat island effect is most pronounced is much warmer than the surrounding, natural, rural lands. The materials used in building, along with energy emissions from industry and transportation (cars), are to blame for the effect. For instance, because asphalt is impermeable, heat is reflected back into the air rather of being transferred to the ground like it does by flora and trees. Typically, heat islands are 2 to 6 degrees F warmer. Urban areas stay warm in the nights while the nearby rural regions drop down; the difference can be as high as 20 degrees F.

Communities may experience a rise in heat-related sickness and death, air pollution, air conditioning expenses, and water quality during the summer months due to heat islands.

Answer:

Recombinant DNA is a technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. Scientists build the human insulin gene in the laboratory.

Explanation:

Answer: Anticyclones form from air masses cooling more than their surroundings, which causes the air to contract slightly making the air more dense. Since dense air weighs more, the weight of the atmosphere overlying a locatiion increases, causing increased surface air pressure.

Explanation:

Answer:

Anticiclones cálidos: Se forman asociados a las zonas de la circulación general de la atmósfera, por convección desde otras zonas anticiclónicas, que empujan al aire, que previamente había subido, hacia abajo. Este aire viene más seco y más frío que su entorno, pero baja a enfriarse todavía más.

Explanation: