The animal group which lacks true tissues and includes species that are asymmetrical is referred to as sponges.
What is Sponges?These are invertebrate animals which belong to the phylum porifera and consists of lots of pores.
They don't give equal parts when divided into half and they lack the presence of true tissues.
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The animal group which lacks true tissues and includes species which are asymmetrical is; Sponges.
Which animal group includes species that are asymmetrical?It follows from biology of classifications that the defining characteristic of sponges includes the fact that they lack true tissues and the species are asymmetrical. Hence, the features indicated in the task content are suggestive of sponges.
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Why might an idea or hypothesis be discarded?
A hypothesis can be discarded due to the emergence of empirical evidence rejecting its assumptions.
What is a scientific hypothesis?A scientific hypothesis is a given explanation about a phenomenon of the real world that is tested by using the scientific method.
Hypotheses are rejected or confirmed by collecting empirical evidence through experimental or observational procedures.
In conclusion, a hypothesis can be discarded due to the emergence of empirical evidence rejecting its assumptions.
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Which strategy is used to assess blood pressure, skin conductance, papillary dilations, and erectile responses?
The strategy used to assess blood pressure among other parameters is; Choice C; Psychophysiological techniques.
Which strategy is used to assess blood pressure, skin conductance, papillary dilations, and erectile responses?In a bid to assess blood pressure, papillary dilations and other parameters, Psychophysiological technuques characterized by the study of the relationship between physiological signals recorded from the body and brain to mental processes and disorders. These biological signals in discuss are often generated by organ activity or by muscle activity
Remark;
A. Cognitive-functional analysis
B. self-monitoring procedures
C. Psychophysiological techniques
D. SIgnal detection strategy
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A biology class is studying the concept of carrying capacity. On a field trip, the
students measure a pond and estimate its surface area to be 240 m². Previous
research shows that each frog in a pond requires about 2 m² of pond space to
survive. How many frogs can this pond support?
A. 120
B. 121
C. 480
D. 484
The diffusion of water across a selectively permeable membrane is
homeostasis
homeostasis
endocytosis
endocytosis
osmosis
osmosis
passive transport
reviewing Meiosis:
Diagram the phases of meiosis using colored pencils to show the homozygous pairs.
a. the starting cell is 2n. how many chromosomes does it have?
b. hom many chromosomes will it have after Meiosis 1?
c. how many chromosomes will it have after Meiosis 2?
a. the starting cell is 2n. how many chromosomes does it have?
30 chromosomesb. hom many chromosomes will it have after Meiosis 1?
23 chromosomesc. how many chromosomes will it have after Meiosis 2?
15 chromosomes.The reason that skin cells start to swell after soaking in water is that the cell membranes are
Which of the following correctly describes the relationship between thermal energy and
temperature?
Select one:
O a. Temperature is a measure of thermal energy
O b. Temperature and thermal energy are the same thing
Both conductors and insulators transfer thermal energy, but not electrical energy.
One of them does not transfer energy.
O d. Both conductors and insulators transfer electrical energy, but not thermal energy.
Using the ultrasonication and agitation method of liposome preparation, what concentration of lipid is necessary to prepare liposomes with a diameter of 250 nm?.
The concentration of lipids necessary to prepare liposomes with a diameter of 250 nm is 0.30 mM.
What are liposomes?Liposomes are vesicles which are made up of a lipid bilayer membrane.
Liposomes are important as delivery vehicles for substances such as drugs.
Ultrasonication is a method of liposomes preparation.
Solution of liposomes is dependent on the size.
The larger the diameter, the smaller the l elution volume. Also, increasing lipid concentration will decreases elution volume.
Therefore, the concentration of lipids necessary to prepare liposomes with a diameter of 250 nm is 0.30 mM.
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ou add a fluorescent antibody to a cell surface protein to a dish of cells. Looking at an individual cell under the microscope the entire surface of the cell is fluorescent. You then hit the cell with a brief pulse from a laser which bleaches out part of the fluorescence on the cell. Over time you notice that the entire surface of the cell becomes fluorescent again. What is the best explanation for this observation
The best explanation for this observation is that the proteins from parts of the cell membrane that were not bleached with the laser diffuse into regions of the membrane that were bleached.
What is an observation?It should be noted that observation means the active acquisition of information from a source.
In this case, the best explanation for this observation is that the proteins from parts of the cell membrane that were not bleached with the laser diffuse into regions of the membrane that were bleached.
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Name three industries in the North?
Arrange the following events in the order in which they occurred.
Answer:
1→4→5→3→2
∙
Mitotic cell division starts with the condensing of chromosome accompanied by splitting of the centrosome and its movement towards the opposite poles.
∙
As the nuclear envelope and nucleolus disappear, spindle fibres arise from the centrosomes and start binding to the condensed chromosomes at the centromeres.
∙
The chromosomes bound by the spindle fibers are then arranged in the middle of the cell forming the equatorial metaphase plate.
∙
Next the centromere splits and the sister chromatids are pulled away towards the poles by the contraction of spindle fibres.
∙
Following this, a cleavage furrow starts to develop in the middle of the cell while the nuclear membrane starts to reappear around the separated chromatids.
∙
The condensed chromatids start thinning into chromatin fibre along with reappearance of the nucleolus and the cleavage furrow deepening further.
∙
Finally as the nuclear membrane becomes fully intact, the cleavage furrow deepens and split the cells from middle into two daughter cells.
Explain why genetic diversity is a good principle for secure development. Cite an example of lack of diversity that has had or can have a negative impact on security.
Answer:
Genetic diversity is a good principle for secure development because it is critical for a population to adapt to changing environments. It helps maintain the health of a population.
Explanation:
Genetic Diversity refers to the range of different inherited traits within a species. In a species with high genetic diversity, there would be many individuals with a wide variety of different traits.
Mutations are important to genetic diversity because it creates a new DNA sequence for a particular gene, creating a new allele. This is important because including alleles that are diverse may be valuable in resisting diseases, pests, and other stresses
Genetic diversity is a good principle for secure development because it ensures the chances of adaptation in living organisms with respect to changing environmental conditions.
What is Genetic diversity?Genetic diversity may be defined as the total number of genetic characteristics in the genetic makeup of a species. It serves as a way for populations to adapt to changing environments. It facilitates the survival of particular species.
A lack of diversity may have a negative impact on security. This can be understood by the example that if there were not many variables seen in the Darwin finches in the Galapagos islands, more birds feel the scarcity of food and due to this, they have died and become extinct from nature.
Therefore, with more genetic variation, it is more likely that some individuals in a population will possess variations of alleles that are suited for the environment.
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Which action is likely to cause air to enter the victim’s stomach (gastric inflation) during bag-mask ventilation?
The action that is likely to cause air to enter the victim’s stomach (gastric inflation) during bag-mask ventilation is ventilating the patient when is chest is not rising.
What is gastric inflation?Gastric inflation is the process in which air is been blown into the stomach of the patient which can be as a result of inflation of the lungs during lung or bag mask ventilation.
Therefore, The action that is likely to cause air to enter the victim’s stomach (gastric inflation) during bag-mask ventilation is ventilating the patient when is chest is not rising.
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Which event took place during the Copernican revolution, when most people started to believe in a heliocentric model of the solar system?
Aristotle developed his model of the solar system.
Copernicus rediscovered Aristarchus’s heliocentric model.
Kepler's laws of planetary motion.
Newton’s theories of gravity were dismissed and considered invalid.
Copernicus rediscovered Aristarchus's heliocentric model. Thus, option "B" is correct.
How, explain your answer?The event which took place during the Copernican revolution, when most people started to believe in the heliocentric model of the solar system was that Copernicus rediscovered Aristarchus’s heliocentric model.
Thus, option "B" is correct.
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animal viruses often have glycoprotein spikes on their capsids or envelopes. group of answer choices true false
According to the research, the statement is true, animal viruses often have glycoprotein spikes on their capsids or envelopes.
What are viruses?It is an obligate intracellular parasite, small in size, made up of nucleic acid and protein.
They have a layer or envelope of lipids and glycoproteins, which they obtain from the cell membrane of their host cells, and which is used to inject genetic material into the cell.
Therefore, we can conclude that according to the research, the statement is true, animal viruses often have glycoprotein spikes on their capsids or envelopes.
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Why do some codons code for the same
amino acid as another codon?
A. It is due to mutations.
B. There are only 20 amino acids and 64 possible
combinations.
C. Each codon is unique and they all code for different
amino acids.
Can someone help me please and thxxx
Answer:
3) x = 3Explanation:
Using the Inscribed Angle Theorem:-
31x + 3 = 192/231x = 96 - 3x = 93/31 x = 3--------——–—---------
To answer this question
⇒ must consider what theorem to use
Theorem used:
⇒ Inscribed Angle
⇒ states that inscribed angles like ∠EFG are half the arc angle
In other words
[tex]31x+3=\frac{1}{2}*192\\\rm \hookrightarrow 3x+3=96\\\rm \hookrightarrow31x=93\\\rm \hookrightarrow x=3[/tex]
Answer: x = 3
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The __________cranial fossa ranges from the posterior edge of the lesser wings of the sphenoid bone (anteriorly) to the anterior region of the petrous part of the temporal bone (posteriorly). It houses the temporal lobes of the brain and the pituitary gland.
The middle cranial fossa ranges from the posterior edge of the lesser wings of the sphenoid bone (anteriorly) to the anterior region of the petrous part of the temporal bone (posteriorly). It houses the temporal lobes of the brain and the pituitary gland.
Where is the Pituitary gland located?Pituitary gland is located within the Mid-brain. It is an endocrine gland, about the size of a pea, that sits in a small, bony cavity at the base of the brain whose secretions control the other endocrine glands and influence growth, metabolism, and maturation.
It lies in the Sella turcica of the sphenoid bone (A compound bone at the base of the skull behind the eyes)
Thus, the middle is the answer.
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What is the original purpose of a
quick stimulus and response in
the body?
A. to protect itself and respond quickly to
dangerous situations
B. to learn about the world
C. to evolve the senses
D. to conserve energy and not move as much
Answer:
A
Explanation:
To protect itself and repond quickly to dangerous situation
A heron, a large wading bird, is hunting in a pond that contains three types of prey: fish, frogs, and snakes. All three types of prey are abundant and provide the same amount of energy to the heron. The heron has the highest handling time capturing fish, an intermediate handling time capturing snakes, and the lowest handling time capturing frogs. What prey item would foraging theory predict that the heron should catch most frequently
The preferred prey item would be frogs.
What is optimal foraging theory?
It is a theory in ecology that proposes that predating animals that get the most energy from minimal efforts are favored by natural selection.
In order words, selection forces prefer investing minimum energy in order to extract maximally available energy.
In this case, the heron needs to use the lowest time to harvest the maximum energy possible. Since all the preys offer the same amount of energy, the one that requires the lowest time would be preferable for the heron.
In other words, frogs would be the most preferable prey.
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Decussation of pyramids refers to crossover of major motor tracts in the ________ region of the brain
The decussation of pyramids refers to crossover of major motor tracts in the medulla oblongata region of the brain.
What is medulla oblongata?The medulla oblongata is the bottom most part of the brain.
It serves as the point where the brain and spinal cord connect, making it a key conduit for nerve signals to and from the body.
It also helps control vital processes like your heartbeat, breathing and blood pressure.
Thus, the decussation of pyramids refers to crossover of major motor tracts in the medulla oblongata region of the brain.
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What is the advantage of starting with the 4x objective before moving to the 10x and then the 40x objective?.
The advantage of starting with the 4x objective before moving to the 10x and then the 40x objective is that the lower power objective has a larger field of view and is easier to focus.
What are objective lens of a microscope?An objective lens of a microscope are those lens that are used to focus that sample on a slide and they are always the closest lens to the slides.
The four types of objective lens of a microscope include:
× 4 objective×10 objective×40 objective andoil immersionThe advantage of starting with the 4x objective before moving to the 10x and then the 40x objective is that the lower power objective has a larger field of view and is easier to focus.
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Which of the following would be made entirely of renewable resources?
OA. A diamond necklace
OB. A wooden basket
OC. A plastic water bottle
OD. A ballpoint pen
Ribosomal subunits are large complexes composed of numerous polypeptides and at least one rrna molecule. Which subunits include three rrna molecules?.
What type of blood vessel carries
oxygen-poor blood back to the
heart?
Answer:
veins
Explanation:
Veins carry oxygen-poor (deoxygenated) blood back to the heart, whereas arteries carry oxygen-rich blood away from the heart.
Explanation:
as blood travels through the body, oxygen is used upand the blood become oxygen poor. oxygen-poor blood returns from the body to the heart through Superior vena cava and inferior vena cava, the two main veins that Bring blood back to the heart. this is my answerHow many ATP are generated from the E.T.C?
Thirty-four (34) ATP is generated from the electron transport chain.
The electron transport chainIt is one of the steps through which energy is extracted from glucose during respiration.
The first step is glycolysisThe second step is the citric acid cycleThe last step is the electron transport chainTwo molecules of ATP are generated from glycolysis, 2 are generated from the citric acid cycle, and 34 are generated from the electron transport chain.
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Organisms inherit specific traits and characteristics from their parents. albinism is an inherited disorder that occurs when an organism is unable to produce or distribute melanin. melanin is a substance in the body that helps determine skin color, hair color, and eye color.
Gene is the basic unit of heredity that carries the trait of albinism from parent to offspring.
What is Gene?This is referred to as the unit of hereditary and is usually transferred from the parent to offspring.
The albinism trait is therefore inherited by the offspring as a result of the gene which is the most appropriate choice.
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How does Hydrosphere affect atmosphere during Australia bushfire?
Help please help! Need help
Answer:
option c. 1 is correct.
*For detailed explanation refer to the attachment.
What primary tissue type comprises the highlighted structure
The primary tissue type comprises the highlighted structure is nervous.
What is the tissue nervous?Nervous tissue is a communication tissue, capable of receiving, interpreting and responding to stimuli. Nerve tissue cells are highly specialized in processing information. Neurons transmit nerve impulses and glial cells collaborate with nerve impulses.
In this case, nerves are structures formed by bundles of nerve fibers, which are part of the peripheral nervous system and act ensuring communication between different parts of the body and the central nervous system.
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