Select the Key innovations in animal evolution

Answer:

The blood first enters the right atrium. It then flows through the tricuspid valve into the right ventricle. When the heart beats, the ventricle pushes the blood through the pulmonic valve into the pulmonic artery.

Explanation:

can you mark me a Brainliest and have a nice day.

Answer: Ignoring the I's which make no sense. your answer should be C

Explanation:

The statement that describes vertebrate species during embryologic development is

Organisms with an internal backbone, sometimes known as a vertebra, are referred to as vertebrates. They have a robust bone skeleton that anchors muscle and supports the body's tissue. Invertebrates are defined as animals without spines.

Vertebrate species exhibit significant commonalities early in their embryologic development, which is a reflection of their shared heritage.

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Answer:

Genepool

Explanation:

I hope this helps

The step of translation in which release factors bind to a stop codon is termination. During this step, the ribosome recognizes the stop codon and triggers the release of the newly synthesized polypeptide chain along with the dissociation of the mRNA and ribosome.

Translation is the process of converting genetic information stored in mRNA into a sequence of amino acids that make up a protein. It is divided into three stages: initiation, elongation, and termination. During termination, the ribosome recognizes the stop codon (UAA, UAG, or UGA) in the mRNA, and a protein called a release factor binds to the A site of the ribosome. This causes the polypeptide chain to be released from the ribosome and folded into its final shape. Finally, the mRNA and the ribosome dissociate from each other. The newly synthesized protein can then undergo further modifications before being transported to its final destination in the cell.

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It is false that a country music star goes through gender reassignment because its' totally there wish to reassign their gender or not.

The term "gender reassignment" applies to a transgender person and is a legal concept. Any person who has suggested, begun, or finished a procedure to switch their sex is included. SRS is not morally or scientifically suitable since it contravenes fundamental moral and legal norms.

Preferably, compositions are given a music star emblem based on how well they performed. The popularity of the song and whether it is an often famous song on a record are the main factors here. The tracks on a record that are performed the most frequently are typically given stars.

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The key feature of HIV virus which makes it hard for the human immune system to beat it is because: (2) the HIV virus has an extremely high rate of mutation.

HIV stands for Human Immunodeficiency Virus. It is a retrovirus infecting the cells of the immune system of the human body. This weakens the immune system and if not treated on time, HIV results in the disease called AIDS which cannot be treated permanently.

Mutations are the changes in the DNA sequence, usually causing some negative effect over the body. Error prone replications are one of the reason for mutations to occur. The replication of HIV virus is highly error prone and it undergoes rapid mutation.

Therefore the correct answer is option 2.

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Answer:

Dipole-Dipole

Explanation:

The type of bond created by a weak electrical attraction between polar molecules is called a dipole-dipole interaction. Dipole-dipole interactions occur between polar molecules, where one molecule has a partial positive charge (δ+) and another molecule has a partial negative charge (δ-). These partial charges result from an uneven distribution of electrons within the molecule, leading to a temporary dipole moment. The positive end of one polar molecule is attracted to the negative end of another, creating a relatively weak bond known as a dipole-dipole interaction.

Answer:

no

Explanation:

Why bother with health insurance? Health insurance provides financial protection in case you have a serious accident or illness. For example, a broken leg can cost up to $7,500. Health coverage can help protect you from high, unexpected costs.

Explanation:

The cell theory, or cell doctrine, states that all organisms are composed of similar units of organization, called cells. The concept was formally articulated in 1839 by Schleiden & Schwann and has remained as the foundation of modern biology. The idea predates other great paradigms of biology including Darwin’s theory of evolution (1859), Mendel’s laws of inheritance (1865), and the establishment of comparative biochemistry (1940).

First Cells Seen in Cork

While the invention of the telescope made the Cosmos accessible to human observation, the microsope opened up smaller worlds, showing what living forms were composed of. The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name. However what Hooke actually saw was the dead cell walls of plant cells (cork) as it appeared under the microscope. Hooke’s description of these cells was published in Micrographia. The cell walls observed by Hooke gave no indication of the nucleus and other organelles found in most living cells. The first man to witness a live cell under a microscope was Anton van Leeuwenhoek, who in 1674 described the algae Spirogyra. Van Leeuwenhoek probably also saw bacteria

The cell theory, states that all organisms are composed of similar units of organization, called cells.

The concept of cell theory was in 1839 by Schleiden & Schwann which leads the foundation of modern biology. Cell theory states that every cell is generated from another preexisting cell.

This idea makes the great revolution in biology including Darwin’s theory of evolution (1859), Mendel’s laws of inheritance (1865), and the establishment of comparative biochemistry (1940).

Schleiden & Schwann propose every organism is composed of the cell, which is the basic unit of life and each cell comes from the preexisting cell, and each cell produces a progeny which is similar to its parent cell.

Therefore, cell theory states the existence of the cell in the organism.

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According to Charles Darwin's theory of evolution by natural selection, the process of natural selection leads to the evolution of species over time.

Natural selection is a process by which certain traits or characteristics that help an organism survive and reproduce are passed down from generation to generation, while other traits are not.

The basic mechanism of natural selection involves three main components: variation, heredity, and differential survival and reproduction. First, there must be variation in traits within a population.

This variation can arise through genetic mutations or other factors. Second, these traits must be heritable, meaning that they can be passed down from parent to offspring. Finally, individuals with certain traits that help them survive and reproduce in their environment will pass those traits on to their offspring at a higher rate than individuals without those traits.

Over time, this process can lead to the evolution of new species. If a population becomes separated from other populations and undergoes different selective pressures, such as different environmental conditions or different competitors, it can evolve in different directions, leading to the development of new species.

Overall, natural selection is a gradual process that operates over long periods of time, and it is driven by the interaction between the environment and the genetic variation present in a population. Through this process, natural selection can lead to the evolution of new species that are better adapted to their environment.

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The claims about the origin of the euglenid chloroplast are best supported by the three-membrane structure of the envelope: it originated from the spontaneous assembly of organic molecules into a lipid bilayer inside a free-living prokaryote.

Thus, the correct answer is A.

Euglenids (Excаvаtа, Discobа, Euglenozoа, Euglenidа) is а group of free-living, single-celled flаgellаtes living in the аquаtic environments. The uniting аnd unique morphologicаl feаture of euglenids is the presence of а cell covering cаlled the pellicle.

The chloroplаsts of Euglenа hаve аrisen from the progressive reduction of endosymbiotic green аlgаe. The theory is supported by the presence of а third membrаne аround the chloroplаsts of Euglenа which is not endoplаsmic reticulum (ER) in origin аnd mаy be derived from the plаsmаlemmа of the originаl symbiont. In аddition, Euglenа is the only orgаnism in which chloroplаst loss cаn be induced experimentаlly. Dinoflаgellаte chloroplаsts аre аlso surrounded by three membrаnes, аnd it is proposed thаt they too evolved from symbiotic eucаryotic аlgаe.

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Answer: lithosphere, hydrosphere, biosphere, atmosphere

Explanation: Land, Water, Living things, and air

Answer:

none of the males or females could be colorblind, assuming that this question is referring to x-linked recessive inheritance patterns.

Explanation:

if it is an x linked recessive trait, then the male's genotype is, with (b) representing colorblindness and (B) representing normal vision. the female, who is h o m o z y g o u s for normal vision, would have the genotype.

It would be impossible for the dad to pass on his colorblind gene to a son, because he can only pass a Y chromosome to the son. and a daughter would get the colorblind gene, but the normal gene donated by the mom would dominate it so the daughter could not actually be colorblind

Answer:

How many cells are in the organism will help the scientist decide if the organism is unicellular or multicellular.

Explanation:

How many cells are in the organism will help the scientist decide if the organism is unicellular or multicellular because A unicellular organism is an organism that have one cell or it is single celled organism while a multicellular organism have many cells present or it is comprises of many cells.

The number of cells will determine if the organism is single cell or multicellular.

Answer:

It Is A Relationship A is mutualism and Relationship B is predation. Hope this help!

Explanation:

Answer:cbd

Explanation:

A culture of gram-positive bacteria is considered too old if it is more than 14 hours.

А Grаm stаin is а test thаt checks for bаcteriа аt the site of а suspected infection such аs the throаt, lungs, genitаls, or in skin wounds. Grаm stаins mаy аlso be used to check for bаcteriа in certаin body fluids, such аs blood or urine. There аre two mаin cаtegories of bаcteriаl infections: Grаm-positive аnd Grаm-negаtive.

Old bаcteriаl cultures contаin cells thаt hаve stаrted dying аnd lost their membrаne integrity. Becаuse Grаm stаining relies on the аbility of the Grаm-positive bаcteriа's peptidoglycаn lаyer to hold the crystаl violet-iodide complex аnd аppeаr purple, аn old culture of Grаm-positive species mаy no longer retаin this feаture аnd stаin pink insteаd. А culture of grаm-positive bаcteriа which is аbout 12-14 hours old is considered to be used for Grаm stаin. More thаn 14 hours old culture is considered аs "too old" to be used for grаm stаin.

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Answer: i am pretty sure its A Prokaryotic

Explanation: Cells fall into one of two broad categories: prokaryotic and eukaryotic. The predominantly single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotes. Animal cells, plant cells, fungi, and protists are eukaryotes \

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****Isra****

Answer:

In primary active transport, the carrier protein uses energy directly from ATP through hydrolysis.

In secondary active transport, it uses energy stored in the concentration gradients of ions.

Answer:

Molecular genetic approaches to the study of plant metabolism can be traced back to the isolation of the first cDNA encoding a plant enzyme (Bedbrook et al., 1980), the use of the Agrobacterium Ti plasmid to introduce foreign DNA into plant cells (Hernalsteens et al., 1980) and the establishment of routine plant transformation systems (Bevan, 1984; Horsch et al., 1985). It became possible to express foreign genes in plants and potentially to overexpress plant genes using cDNAs linked to strong promoters, with the aim of modifying metabolism. However, the discovery of the antisense phenomenon of plant gene silencing (van der Krol et al., 1988; Smith et al., 1988), and subsequently co‐suppression (Napoli et al., 1990; van der Krol et al., 1990), provided the most powerful and widely‐used methods for investigating the roles of specific enzymes in metabolism and plant growth. The antisense or co‐supression of gene expression, collectively known as post‐transcriptional gene silencing (PTGS), has been particularly versatile and powerful in studies of plant metabolism. With such molecular tools in place, plant metabolism became accessible to investigation and manipulation through genetic modification and dramatic progress was made in subsequent years (Stitt and Sonnewald, 1995; Herbers and Sonnewald, 1996), particularly in studies of solanaceous species (Frommer and Sonnewald, 1995).

Answer:

what syndrome

Explanation:

zvanswerefh

Explanation:

Riddick DM Inc cucumber CTN ay be bunching

Answer:

Insulin is an essential hormone produced by the pancreas. Its main role is to control glucose levels in our bodies.

Answer:

he is your friend and I am not

Answer:

I think B should be the answer because science cannot tell the future