Answer:
fish: blood flows unidirectionally from the two-chambered heart through the gills and then the rest of the body.
mammal: Blood is pumped from veins of the systemic circuit into the right atrium of the heart, then into the right ventricle. Blood then enters the pulmonary circuit, and is oxygenated by the lungs. From the pulmonary circuit, blood re-enters the heart through the left atrium.
List all the gametes that are possible with each of the following genotypes.
a. Aabb
d. AABb
b. AaBB
e. AAbb
C. AaBb
f. aabb
All the possible gametes for Aabb would be Ab and ab; that of AABb would be Ab and AB; that of AaBB would be AB and aB; that of AAbb would be Ab; that of AaBb would be AB, Ab, aB, and ab; and that of aabb would be ab respectively.
Gametes formationThe formation of gametes for a dihybrid involves the crossing of the two traits involved.
Thus: Aabb is equivalent to crossing Aa and bb
Aa x bb
Ab Ab ab ab
Hence, all the gametes would be Ab or ab.
For AABb: AA x Bb = AB Ab AB Ab
The gametes are either AB or Ab
For AaBB: the gametes are either AB or aB
For AAbb, only Ab gametes are produced
For AaBb: the gametes would be AB Ab aB and ab
For aabb: only ab gametes are produced.
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Reptiles lay eggs as a means of reproducing, while mammals give birth to live young.
Which statement best demonstrates a reproductive disadvantage of mammals?
O The long development time can be risky for both the embryo and the mother.
O The embryo may be exposed to predators.
O The embryo is protected in the mother, and when it is born, it is usually well developed.
O The offspring are born full size.
Answer:
The long development time can be risky for both the embryo and the mother.
Explanation: The long development time can be risky for both the embryo and the mother.
How is seawater intrusion a negative impact to the ecosystem?.
Answer:
Harm the availability or quality of source waters for drinking water utilities.
Explanation:
Why is a plant classified as an autotroph
Answer:
Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel. These primary producers form the base of an ecosystem and fuel the next trophic levels.
write down the function of gynoecium
Answer:
The female reproductive organ of angiosperms, the gynoecium, often consists of the fusion of multiple ovule-bearing carpels. It serves the important function of producing and protecting ovules as well as mediating pollination.
Explanation:
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If any Kardashian sister expresses an unknown X-linked recessive trait, what is the probability that her son would also express the same trait
Compare the relationship between carrying capacity and limiting factors
Answer:
The maximum population size that an ecosystem can support is called carrying capacity. Limiting factors determine carrying capacity. The availability of abiotic factors (such as water, oxygen, and space) and biotic factors (such as food) dictates how many organisms can live in an ecosystem.
Explanation:
Why is biochemical evidence the strongest form of evolutionary evidence
Answer:
Biochemistry provides evidence of evolution in terms of modifications in various biological molecules, such as enzymes Explanation:
Answer: Try this Why is biochemical evidence the strongest form of evolutionary evidence
Explanation: It will give you some important information of what you are learning in high school!
How does a noncompetitive inhibitor decrease the rate of an enzyme-catalyzed reaction?.
What does fossil evidence show about evolution?
Answer:
Answer below
Explanation:
Fossils provide physical examples of what organisms have looked like over time. For example, we can look at giraffes over time, who have evolved to have had long necks. When we look as fossil records of giraffes and similar species, we see that the longer ago that animal lived, the shorter their neck was, and as time progresses, the neck gets longer. However, we also see that in general the giraffes with longer necks, regardless of time period, will have lived longer and healthier lives (we can usually tell this just by how big the fossil is), as with longer necks the animal was able to reach more food and live longer. That giraffe then reproduced and shared their longer neck traits, while those with genetic markings to make their necks shorter will have died before reproducing. Therefore, we can see all forms of evolution through fossils.
RNA is made because DNA is always in the nucleus,but ribosomes for making proteins are found in the _______
Answer:
Cytoplasm
Explanation:
In eukaryotes, there is a definite nucleus where the ribosome and mRNA production takes place. The ribosomes and mRNA come out of the nucleus into the cytoplasm where the ribosomes work upon and catalyze the formation of proteins. Meaning that in eukaryotic cell, ribosomes make proteins in the cytoplasm.
Explanation:
Ribosome existed in the rough endoplasmic reticulum and existed freely in cytoplasm
Which of the following stages is the first step during the process of transcription
Explanation:
RNA polymerase moves in the part of the DNA that has been opened and forms a complement to one of the strands of DNA called RNA.
Absorption of glucose from the gut lumen depends on.
Answer:
protein and starch
Explanation:
the absorption depends on protein and starch
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Sylvite is the best for manufacturing plant use, because sylvite is a key component of fertilizers, hence option A is correct.
What are minerals?Usually created by inorganic processes, a mineral is a naturally occurring homogeneous solid with a specific chemical makeup and a highly ordered atomic organization.
About 100 of the known mineral species the so-called rock-forming minerals make up the majority of the known mineral species, which number in the thousands. On the basis of their chemistry and crystal shape, minerals are categorized.
Metallic and non-metallic minerals are the two categories into which minerals fall. Metallic minerals have luster in their look and are chemically composed of metals. These minerals can be mined to obtain them as a possible source of metal.
Therefore, option A is correct.
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Identifying an individual’s genetically influenced health risks could increase their potential to achieve optimal health. please select the best answer from the choices provided t f
It is a true statement that; "Identifying an individual’s genetically influenced health risks could increase their potential to achieve optimal health."
What are genetically influenced health risks?Genetically influenced health risks are those healt risks that arise as a result of the genes inherited by an individual. These individuals may be predisposed to certain diseases due to their genotype.
Hence, it is a true statement that; "Identifying an individual’s genetically influenced health risks could increase their potential to achieve optimal health."
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The membrane surrounding all cells is called
molecules cross it, while keeping other substances in (or out).
because it lets some
O excrete
O semi-permeable
O osmosis
O isotonic
Answer:
I believe that this one is the cell membrane, but double-check.
Explanation:
A piece of dna that is used to carry a gene of interest into a cell is known as what?.
Plasmid carries a gene into a cell
A piece of DNA that is used to carry a gene of interest into a cell is known as Vector. This is because it is a vehicle that significantly carries foreign DNA molecules into the host cell.
What is Gene?Gene may be defined as a stretch of DNA that has genetic information. It is the nucleotide sequence that has the ability to produce a functional protein or enzyme.
According to the context of this question, a vector is commonly used in recombinant DNA technology. It is a double-stranded, circular extrachromosomal DNA that is separated or detached from the genomic DNA.
It has quite a difference with plasmid. The Plasmid is generally an extrachromosomal element of the bacterial cell.
Therefore, a vector is a piece of DNA that is used to carry a gene of interest into a cell.
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A large population of turtles lives on Island A. During a major storm, half of these turtles are washed onto a neighboring Island B. Over millions of years, the two populations diverge, or grow differently, leading to natural selection on the two islands. The two populations of turtles from Island A and Island B are brought back together after another storm. What can be said about these turtles?
What that can be said about these turtles is that Even though they were geographically Isolated, they are no longer two species because they are living together again.
What is population?Population refer to total number of living organisms of species that interact with their environment and living in a same place at the same time.
Therefore, What that can be said about these turtles is that Even though they were geographically Isolated, they are no longer two species because they are living together again.
The question is incomplete because the options were not given but the options was gotten from another website.
They will combine into one population again Even though they were geographically Isolated, they are no longer two species because they are living together again Geographical isolation will have created two new species.Learn more about population below.
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Match the picture with the following listings
I’ll give Brainliest if correct
Please
Answer:
Vestigial Structures: Picture on top right (the ostrich)
Anatomical Evidence: Picture in the middle (the multiple animal legs)
Molecular Evidence: Picture on bottom left (the DNA)
Embryological Development: Picture on bottom right (the creature developing and growing)
Fossil Evidence: Picture on top left (the bones)
Which neuronal circuit pattern is similar to a positive feedback loop involving neurons?.
The pattern similar to this is called Reverberation
What are the gonads in the male reproductive system.
Both men and women have gonads. In males, they are the testes, or testicles, the male s#x glands that are part of the male reproductive system. They are located behind the p#nis in a pouch of skin called the scrotum. The female gonads, the ovaries, are a pair of reproductive glands.
How does carbon get from plants to animals like cows?
Answer:
Animals breath out Carbon and breath in Oxegon but plantes breath out Oxegon and breath in Carbon so a animal breath out the Carbon and the paint breaths that in and breaths out the Oxegon so the animal breaths the
Oxegon in
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What is the role of oxygen in photosynthesis and in cellular respiration?
A) Oxygen is used in photosynthesis to produce glucose and is released during cellular respiration
B) Oxygen is released in photosynthesis and used in cellular respiration to produce energy
C) Oxygen is combined with carbon dioxide in photosynthesis to release energy and released from carbon dioxide during cellular respiration
D) Oxygen is released from glucose during photosynthesis and combines with carbon dioxide to produce energy during cellular respiration
The main role of oxygen in photosynthesis and respiration is that Oxygen is released in photosynthesis and used in cellular respiration to produce energy.
Role of oxygen in photosynthesis and respirationIn photosynthesis, water and carbon dioxide reacts to form oxygen and glucose while on the other hand, In cellular respiration, oxygen is used to break down glucose in order to release energy in the form of ATP.
So we can conclude that the main role of oxygen in photosynthesis and respiration is that Oxygen is released in photosynthesis and used in cellular respiration to produce energy.
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if both parents are heterozygous for a window's peak, what are the possible genotype and phenotypes of their children?
Possible Genotypes: WW, Ww, ww
Possible Phenotypes: Has widow's peak or doesn't have widow's peak.
prokaryotic cells have nulcleus
Answer:
not nucleus, only nucleoid
Answer:
Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles differentiates prokaryotes from another class of organisms called eukaryotes.
Explanation:
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Assume all of the presynaptic synapses identified produce epsps. If two of these synapses fired simultaneously, which synaptic combination brings the initial segment closest to threshold based on spatial summation?.
The synapses that are nearer to the axon hillock would bring the initial segment closest to the threshold based on spatial summation.
What is neuron synapsis?In neurosciences, the term synapsis makes reference to the connection between two nerve cells (neurons).
Synapsis is produced by the connection between axons and dendrites among different neurons.
Spatial summation refers to the start (trigger) of the action potential in neurons via two or more presynaptic cells.
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How are the tortoises that Darwin studied on the Galapagos similar to the anoles that Losos studied in the Caribbean
Answer:
Some tortoises, including Lonesome George, have shells that rise in front, like a saddle. This adaptation makes it easier for them to lift their heads high to eat tree cactus and to resolve disputes over limited food resources, which they do through raising their heads as high as possible during social interactions.
Explanation:
Describe the relationship between rocks and fossils found in the same rock layer.
Answer:
The three concepts are summarized in the general principle called the Law of Fossil Succession: The kinds of animals and plants found as fossils change through time. When we find the same kinds of fossils in rocks from different places, we know that the rocks are the same age. Scientists look for ancestors and descendants through geologic time.
Explanation:
what can a geologist conclude about a limestone rock layer through relitive age
Answer:
The answer is A
Explanation:
I found the answer on a website
Answer:
I think your answer is B.
Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in. The age of formations is marked on a geologic calendar known as the geologic time scale. Development of the geologic time scale and dating of formations and rocks relies upon two fundamentally different ways of telling time: relative and absolute.
Relative dating places events or rocks in their chronologic sequence or order of occurrence. Absolute dating places events or rocks at a specific time. If a geologist claims to be younger than his or her co-worker, that is a relative age. If a geologist claims to be 45 years old, that is an absolute age.
Relative Dating
Superposition: The most basic concept used in relative dating is the law of superposition. Simply stated, each bed in a sequence of sedimentary rocks (or layered volcanic rocks) is younger than the bed below it and older than the bed above it. This law follows two basic assumptions: (1) the beds were originally deposited near horizontal, and (2) the beds were not overturned after their deposition.
Faunal Succession: Similar to the law of superposition is the law of faunal succession, which states that groups of fossil animals and plants occur throughout the geologic record in a distinct and identifiable order. Following this law, sedimentary rocks can be “dated” by their characteristic fossil content. Particularly useful are index fossils, geographically widespread fossils that evolved rapidly through time.
Crosscutting Relationships: Relative ages of rocks and events may also be determined using the law of crosscutting relationships, which states that geologic features such as igneous intrusions or faults are younger than the units they cut across.
Inclusions: Inclusions, which are fragments of older rock within a younger igneous rock or coarse-grained sedimentary rock, also facilitate relative dating. Inclusions are useful at contacts with igneous rock bodies where magma moving upward through the crust has dislodged and engulfed pieces of the older surrounding rock.
Gaps in the geologic record, called unconformities, are common where deposition stopped and erosion removed the previously deposited material. Fortunately, distinctive features such as index fossils can aid in matching, or correlating, rocks and formations from several incomplete areas to create a more complete geologic record for relative dating. Relative dating techniques provide geologists abundant evidence of the incredible vastness of geologic time and ancient age of many rocks and formations. However, in order to place absolute dates on the relative time scale, other dating methods must be considered.
Absolute Dating
The nuclear decay of radioactive isotopes is a process that behaves in a clock-like fashion and is thus a useful tool for determining the absolute age of rocks. Radioactive decay is the process by which a “parent” isotope changes into a “daughter” isotope. Rates of radioactive decay are constant and measured in terms of half-life, the time it takes half of a parent isotope to decay into a stable daughter isotope.
Some rock-forming minerals contain naturally occurring radioactive isotopes with very long half-lives unaffected by chemical or physical conditions that exist after the rock is formed. Half-lives of these isotopes and the parent-to-daughter ratio in a given rock sample can be measured, then a relatively simple calculation yields the absolute (radiometric) date at which the parent began to decay, i.e., the age of the rock.
Of the three basic rock types, igneous rocks are most suited for radiometric dating. Metamorphic rocks may also be radiometrically dated. However, radiometric dating generally yields the age of metamorphism, not the age of the original rock. Most ancient sedimentary rocks cannot be dated radiometrically, but the laws of superposition and crosscutting relationships can be used to place absolute time limits on layers of sedimentary rocks crosscut or bounded by radiometrically dated igneous rocks.
Sediments less than about 50,000 years old that contain organic material can be dated based on the radioactive decay of the isotope Carbon 14. For example, shells, wood, and other material found in the shoreline deposits of Utah’s prehistoric Lake Bonneville have yielded absolute dates using this method. These distinct shorelines also make excellent relative dating tools. Many sections of the Wasatch fault disturb or crosscut the Provo shoreline, showing that faulting occurred after the lake dropped below this shoreline which formed about 13,500 years ago. As this example illustrates determining the age of a geologic feature or rock requires the use of both absolute and relative dating techniques.
Explanation:
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Tori
How do you clam and earthworm organs differ
Answer:
The marine clamworm, Nereis, is carnivorous therefore its digestive system differs from that of the herbivorous earthworm, Lumbricus. The mouth and jaws are retractable (Figure 8, 9). If the jaws are retracted, cut along the midline of the pharynx and pull the jaws out with a pair of forceps.
Explanation:
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