Which are true about an ion?
Check all that are true.

It will always have more neutrons than protons.

It can have a negative charge.

It will always have fewer neutrons than protons.

It can have a positive charge.

Answer:

In Science last year, they called them, Parasitic Plants

Explanation:

Answer:

Holoparasites get all of their food and nutrients from a host plant. Rafflesia and the dodder are holoparasites. The term "hemiparasite" refers to an organism that gets some of its nutrients from its host but also performs photosynthesis (the process by which non-parasitic plants make their own food).

Explanation:

An ichnofossil is any part of the hard skeleton left behind by a vertebrate in the fossil record. This statement is false. An ichnofossil is a trace fossil, which is any indirect evidence of past life, such as tracks, burrows, and feces. It is not part of the hard skeleton left behind by a vertebrate.

Cladograms are scientific hypotheses that can be overturned by new data. This statement is true. Cladograms are diagrams that show the evolutionary relationship between organisms based on various traits. New data can cause changes to be made to cladograms which can result in a change to the interpretation of the evolutionary history of organisms.

Angiosperm plants did not appear until after the extinction of the dinosaurs. This statement is false. Angiosperms, also known as flowering plants, appeared in the fossil record at least 140 million years ago. Although the dinosaurs went extinct around 66 million years ago, angiosperms were already widespread and diversifying by that time.

The definition of an analogous character is "a character that has a similar function to a character in a different organism, but these similarities are due to different evolutionary origins". This statement is true. Analogous characters are traits that have evolved independently in different groups of organisms due to similar environmental pressures and not due to a shared ancestor.

In evolution, non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation. This statement is true. Non-genetic changes that occur during an organism's life span are not heritable and cannot be passed on to the next generation. Only genetic changes that occur in the germ cells, such as mutations, can be passed on to the offspring.

The definition of a monophyletic group is "a group of organisms that has a single ancestor and contains only some of the descendants of this unique ancestor". This statement is false. A monophyletic group is a group of organisms that has a single ancestor and contains all of the descendants of this unique ancestor. This group is also called a clade.

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Answer:

1. bacteria and fungi that break down

Decomposers

2. the basic relationships that show how a community of plants, animals, and bacteria live and grow and how these living things are dependent on each other as well as the Sun, soil, and other nonliving parts of their environment; a cycle  

Ecosystem

3. line of plants and animals that shows the order in which organisms are eaten of relationships

Food chain

4. a diagram that shows the connections among food chains in an ecosystem

Food web

5. organisms that eat producers

Primary consumers

6. organisms that eat primary consumers

Secondary consumers

7. predator that eats secondary consumers

Tertairy Consumers

The genetic information carried by DNA is transcribed into a code that is carried by RNA, which is translated into a specific protein that determines a phenotype. Thus option A is correct.  

The central dogma of life consist of replication, transcription, translation and reverse transcription.

The process in  which RNA are formed from DNA is called as Transcription where as the process in which Protein synthesis occur from RNA is called as translation.

Transcription occurs in the nucleus where as Translation occurs in the cytoplasm.

In Initiation phase of transcription RNA dependent polymerase bind to DNA promoters.

The initiation phase of translation involves association of  ribosome subunits, tRNA, and initiation factor to mRNA.

Termination step of of transcription includes the release of RNA transcript or mRNA

In translation the ribosome meets stop codons which leads to the dissociation of the ribosome from polypeptide chain. Thus option A is correct.  

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The molecular evidence most likely used to develop this new evolutionary tree is DNA sequence analysis. This method involves comparing the DNA sequences of different bird species to determine their genetic similarities and differences. The higher the similarity in DNA sequences, the more closely related the species are believed to be.

In this case, the DNA sequence analysis would have shown a higher genetic similarity between flamingos, grebes, and pigeons than between flamingos, egrets, and penguins. This evidence supports the new position of the flamingos in Group B, indicating that they share a more recent common ancestor with grebes and pigeons.

For question 85, we can choose a bird species from Group A and Group B and discuss a reason why researchers might have originally thought they should be on the same branch of the tree.

Bird species from Group A: Penguins
Bird species from Group B: Flamingos

One reason researchers may have originally thought penguins and flamingos should be on the same branch is their shared adaptation for aquatic environments. Both species have unique features, such as webbed feet and specialized beaks, which allow them to thrive in aquatic habitats and feed on aquatic prey.

These similarities might have initially led researchers to believe that they shared a closer evolutionary relationship than they actually do, which is why the new molecular evidence prompted a revision of their positions in the evolutionary tree.

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Answer:

Anther: Male

Filament: Male

Ovary: Female

Petal: Neither

Pistil: female

Stamen:male

Stem: Neither

Stigma: Female

Style: Female

Explanation:

Hopes this help you

Answer:

Urban sprawl is basically another word for urbanization. It refers to the migration of a population from populated towns and cities to low density residential development over more and more rural land. The end result is the spreading of a city and its suburbs over more and more rural areas.

Answer:

Urban sprawl is when the population of a city becomes dispersed over an increasingly large geographical area. This movement from higher density urban cores to lower density suburbs means that as cities expand, they often begin to take up significant tracts of land formerly used for agriculture.

Explanation:

Answer:

capsid

When found outside of host cells, viruses exist as a protein coat or capsid, sometimes enclosed within a membrane. The capsid encloses either DNA or RNA which codes for the virus elements. While in this form outside the cell, the virus is metabollically inert; examples of such forms are pictured below.

Explanation:

The most direct way to change the rate of osmosis across a cell membrane, while keeping the concentration gradient constant, is to modify the surface area or permeability of the membrane.

Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. To change the rate of osmosis, while keeping the concentration gradient constant, the surface area or permeability of the cell membrane can be altered.

Increasing the surface area of the cell membrane provides more space for water molecules to pass through, thereby increasing the rate of osmosis. This can be achieved by modifying the shape or structure of the membrane, such as increasing its folds or adding microvilli.

Alternatively, altering the permeability of the cell membrane can directly impact the rate of osmosis. Permeability refers to the ease with which molecules can pass through the membrane. By changing the composition or properties of the membrane, such as the presence of specific proteins or channels, the permeability can be adjusted. This modification allows for a higher or lower rate of water movement across the membrane, thereby influencing the rate of osmosis.

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Imagine a chromosome that has alleles ""r"" and ""g"" on it. The homologous chromosome has different versions of these genes and contains the ""r"" and ""g"" versions. The possible gamete combination that can occur is RrGg.

In the field of science, homozygous chromosomes can be described as chromosomes that have the same alleles for a gene, On the other hand, heterozygous chromosomes have different alleles for a gene.

According to the question above, the homologous chromosomes have different versions of the genes. This means that one of the chromosomes would have 'R' allele and the other 'r'. Similarly, there will one 'G' allele and the other will be 'g' allele.

The gamete combination for such chromosomes will be RrGg.

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Answer:

DNA

Explanation:

When a cell with 10 chromosomes undergoes mitosis and cytokinesis,

1) Two daughter cells are produced.
2) Each daughter cell has 10 chromosomes.

Here's a step-by-step explanation:
1. The cell begins with 10 chromosomes.
2. During the S phase of the cell cycle, each chromosome is replicated, resulting in 20 sister chromatids.
3. During mitosis, the sister chromatids are separated and equally distributed to two new cells.
4. Cytokinesis divides the cytoplasm, creating two separate daughter cells.
5. Each daughter cell now has 10 chromosomes, maintaining the original chromosome number.

Mitosis is a type of cell division in which one cell divides into two identical daughter cells. This process is essential for the growth, repair, and maintenance of all organisms.
Cytokinesis is the final stage of the mitotic cell cycle and involves the division of the cell's cytoplasm to form two separate daughter cells.
Mitosis and cytokinesis lead to the production of two daughter cells from one parent cell.

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Answer:

Chlorophyll

Explanation:

Chlorophyll is a green pigment found in chloroplast

Subphylum Vertebrata are  most diverse and dominant group of chordates

Any animal belonging to the dominant subphylum of the phylum Chordata, Vertebrata, is a vertebrate, also known as a Craniata. The word "vertebrate" refers to animals with backbones, gills, and central nervous systems that are at least partially developed. All animals with these characteristics belong to the subphylum Vertebrata. Animals classified as vertebrates include jawless fish, bony fish, sharks, rays, mammals, birds, and reptiles.

Medical Definition of Vertebrata

creatures with segmented spinal columns, including mammals, birds, reptiles, amphibians, and fish, as well as a few primitive forms in which the backbone is represented by a notochord, make up the chordates subphylum.

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Answer:

c

Explanation:

i did the test *^*

Answer:

Chemical energy into mechanical energy.

hope this helps.

Answer:

Nitrate deficiency

Explanation:

Plants absorb nitrates in water through their roots. Nitrates are present in high levels in plant fertilisers. Without nitrates, the amount of chlorophyll in leaves reduces. This reduces the plant's ability to photosynthesise and grow properly, which reduces the farmers' crop yield .

When the signaling molecule binds to the ag protein, the G protein is activated. The G protein then activates an enzyme that produces a second messenger called cAMP. This statement is true.

G proteins are also called guanine nucleotide-binding proteins. It is a family of proteins which act as molecular switches inside cells that are involved in transmitting signals from various stimuli outside a cell to its interior.

Activation of a single G protein affects the production of hundreds or more of these second messenger molecules. The messengers are cyclic AMP [cAMP], diacylglycerol [DAG], and inositol 1, 4, 5-triphosphate [\(IP_3\)]. These are small molecules which initiate and coordinate intracellular signaling pathways.

Thus, when the signaling molecule binds to the ag protein, the G protein is activated. The G protein then activates an enzyme that produces a second messenger called cAMP. This statement is true.

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Answer- The main elements involved in carbon cycle are carbon oxygen and Hydrogen and these make up tw reactants and products of both photosynthesis and cellular respiration reaction

Explanation- hope u like it

Answer:

Millions of years from now, paleontologists may dig into Earth and uncover fossils from our own time. They may, like scientists today, construct a chronology of what came before them, watching past species popping into—and later out of—existence. Today, humans are continually driving species to extinction—by one estimate, almost 500 vertebrate species have gone extinct in the past 100 years—but will those future scientists be able to tell? New research suggests that it might not be easy: Only a small proportion of these human-caused extinctions will leave behind a fossil trace—and the most threatened species are the ones least likely to be preserved for posterity.

The history of life on Earth is punctuated by what researchers call the “Big Five” mass extinctions, a group that includes the dinosaur-killing Cretaceous-Tertiary extinction and several other, even more severe, events. Many scientists now want to add a sixth: the one that humans are causing all over the globe today. But it’s hard to gauge just how severe the current extinction crisis is, compared with others in Earth’s sometimes tumultuous history. Modern extinctions are documented, sometimes in real time. But the Big Five are measured using only the fossil record, a history of those species that were buried and preserved by sediments over time.

That’s why Roy Plotnick, a paleontologist at the University of Illinois, Chicago, and lead author of the study, thinks about far-flung scenarios involving future paleontologists. “We really need to look at modern day extinctions as if they were in the fossil record already, in order to make a comparison,” he says. So he and his colleagues searched fossil databases for modern mammal species—both those threatened by extinction and those that aren’t—to see how many modern extinctions would be detectable by relying only on fossils.    

Explanation:

Answer:

d

Explanation:

Biodiversity is what the trees and the animals live on so they need it to survive.

Answer: The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.

Answer:

\({\boxed {\sf Adenine \ with \ Uracil}}\)

\(\boxed {\sf Cytosine \ with \ Guanine }}\)

Explanation:

In RNA (ribonucleic acids), the nitrogen bases are:

The bases pair like:

So, the base pairs for RNA are A with U and C with G

Individuals, who have one normal allele and one sickle cell allele, are able to resist malaria. This gives them a better chance of reaching reproductive age. This is known as impure breed advantage.

Heterotic balance (impure breed advantage ) polymorphisms expand whilst the health ofimpure breed is better than the health of each pure breeds in a given population. A traditional case of balanced polymorphism in human populations is sickle cell anemia.

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Sexual reproduction increases genetic variation within a species.

Yes, it is possible to trace the movement of proteins through the endomembrane system. The endomembrane system consists of several organelles, including the endoplasmic reticulum (ER), Golgi apparatus, lysosomes, and plasma membrane, that work together to process and transport proteins within the cell.

The journey of a protein begins in the ER, where it is synthesized. From here, proteins can take different paths depending on their destinations. Some proteins remain in the ER, while others are transported to the Golgi apparatus. In the Golgi apparatus, proteins undergo further modifications, such as glycosylation, and are sorted into vesicles.
These vesicles then transport the proteins to their final destinations. Some vesicles carry proteins to the plasma membrane, where they are secreted out of the cell. Other vesicles merge with lysosomes, which contain enzymes that break down unwanted proteins.
To trace the movement of proteins, scientists use techniques like protein tagging with fluorescent dyes or genetic engineering. These methods allow researchers to track proteins in real time as they move through the endomembrane system.
Overall, the endomembrane system plays a crucial role in protein processing and transport within the cell, and tracing the movement of proteins helps us understand the intricate mechanisms underlying cellular functions.

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Answer:

Bacteria interfered with

normal life of the birds

Explanation:

Statement C. a segment of human DNA is inserted into the DNA sequence of a bacterium is an example of gene splicing.

The gene splicing process also called recombinant DNA is a methodology to ligate different gene sequences in order to create a chimeric protein that may be used with diverse objectives such as the production of human insulin.

Therefore, with this data, we can see that the gene splicing process in genetic engineering is a fundamental technology based on the ligation of distinct sequences.

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