Answer:
Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes. Every normal human cell contains 23 pairs of chromosomes, for a total of 46 chromosomes. A trait is any gene-determined characteristic and is often determined by more than one gene
The opening and closing of the heart valves is caused by Multiple Choice action potentials within the cusps of the valves. pressure changes of alternating contraction and relaxation during the cardiac cycle. contraction and relaxation of papillary muscles that pull on heart strings. contraction of the smooth muscle in the walls of the great vessels leaving the heart.
Answer:
pressure changes of alternating contraction and relaxation during the cardiac cycle.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
Hence, the opening and closing of the heart valves is caused by pressure changes of alternating contraction and relaxation during the cardiac cycle.
3.2 Exploin in detail 5 socio-economic factors
that influence your study
choices and your future career
Answer:
There are various social economic factors that affect a personal choice of higher education course and future career. Some of these factors include
Gender and equity Personal preferences The economic status of the student and the family Employment opportunities for the course being studied Religion and beliefs.Al these factors and many more are said to affect the higher education course that a student takes and the future career of this student
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Insects are the most diverse group of organisms, in terms of numbers of species, dominating terrestrial habitats.
a. True
b. False
Match the following prokaryotic classes with differing modes of metabolism with the appropriate descriptions - obligate anaerobes - Facultative anaerobes - Aerotolerant anaerobes - Obligate aerobes A. can shift their metabolism between anaerobic and aerobic modes B. Oxygen-sensitive, can only use anaerobic mode of nutrition C. unable to survive for extended periods in the absence of oxygen. They require oxygen for cellular respiration. D. cannot conduct cellular respiration but are not damaged by oxygen when it is present
Answer:
- Obligate anaerobes: B
- Facultative anaerobes: A
- Aerotolerant anaerobes: D
- Obligate aerobes: C
Explanation:
Obligate anaerobes are microorganisms that dead in normal atmospheric oxygen (O2) levels (around 21%). Some examples of obligate anaerobes are procaryotic bacteria such as Clostridium, Fusobacterium, Actinomyces and Peptostreptococcus. Facultative anaerobes are organisms that can grow without O2 and produce energy by fermentation, but they can produce more energy (ATP) by the aerobic respiration mechanism. Facultative anaerobes include both prokaryotic (e.g., Escherichia coli) and eukaryotic (e.g., Saccharomyces cerevisiae) organisms. Aerotolerant anaerobes are microorganisms that can live in O2 atmospheric conditions, but they use fermentation as cellular mechanism to produce energy (ATP). Some examples of aerotolerant anaerobes are lactobacilli and streptococci (bacteria) found in the oral microbiota. Finally, obligate aerobes are organisms that can grow only in normal O2 conditions and metabolize foods through cellular respiration, a process more energetically efficient than fermentation. An example of an obligate aerobe is the human species.
how does diffusion impact the toxicity of an environment?
Answer:
A chemical's physical state and the route of exposure influence toxicity. ... Inhalation exposure also allows some rapid entry into the systemic circulation, causing toxic effects distant from the entry route.
Explanation:
8. X= 36 x 12 of 18
9. X = (25 x 3) = 15
10. X = 12 x 14 of 16
Explanation:
8: X. =. 36x12x18=7776
9:. X. =. 25x3=15
X. =. 75=15
X. =. 5
10:. X. =. 12x14x16=2688
BIOLOGY CIRCULATORY SYSTEM!! WILL NAME BRAINLIEST IF YOU ANSWER CORRECTLY!!
Answer:
C, G, F, I, H, D, A, E, B
They are in order from top to bottom
The heron has long legs so that it can walk in the shallow water and catch fish.what is this type of adaptation called?
Answer:
Aquatic Adaptation
Characteristics of codon
How many alleles are typically present in a genotype?
Answer:A genotype is the combination of two alleles, one received from each parent. The expression of a genotype is called the phenotype and the specific combination of the two alleles (the genotype) influences the physical expression (the phenotype) of the physical trait that the alleles carry information for.
Explanation: so 2
If sports drinks have a higher solute concentration than blood, what condition may result when you drink them?
are fossils derived from a common ancestor ?
Answer:
I think the answer is yes or true because I know there are fossils of our ancestors, which was found
WInch ferm refer to the existence of a wide range of different types of organisms in a given place at he same time?
Answer:Short Answer
6. F (page 12) 7. F (page 11) 8. F (page 7) 9. T (page 18)
10. T (page 14)
1. Companies common to most fire departments include (Students should include five of the following): (1) Engine company: An engine company is responsible for securing a water source, deploying handlines, conducting search-and-rescue operations, and putting water on the fire. (2) Truck company: A truck company specializes in forcible entry, ventilation, roof operations, search-and-rescue operations above the fire, and deployment of ground ladders. They are also called ladder companies. (3) Rescue company: A rescue company usually is responsible for rescuing victims from fires, confined spaces, trenches, and high-angle situations. (4) Brush company: A brush company is dispatched to woodland and brush fires that larger engines cannot reach. (5) Hazardous materials company: A hazardous materials company responds to and controls scenes involving spilled or leaking hazardous materials. (6) Emergency Medical Services (EMS) company: An EMS company responds to and assists in transporting medical and trauma patients to medical facilities for further treatment. EMS personnel often have medications, defibrillators, and other equipment that can stabilize a critical patient during transport.
Explanation:
Mary received a flu vaccine. Why didn't the vaccine make her sick?
Mary didn't get sick from the flu vaccine because it contains the smaller portion of the flu which isn't strong enough to infect you. Moreover, your white blood cells attack the portion of the flu while the memory cells take note of the flu, so when it comes next time, it won't affect your body because it knows how to fight the virus.
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The active site of an enzyme is damaged, leaving it nonfunctional.
How would this change to the enzyme's function be best described using the graph above?
Choose 1 answer.
The reaction originally proceeded through the path of Y, but now proceeds through the path of
Х.
B
The reaction would continue to proceed through the path of Y.
The reaction originally proceeded through the path of X, but now proceeds through the path
of Y
The reaction would continue to proceed through the path of x
Answer: The reaction originally proceeded through the path of y but now proceeds through the path of X is the answer
Explanation:
Since the enzyme works based on a lock and key model, the reaction will continue through path X (the path of the uncatalyzed reaction).
An enzyme is a biological catalysts that promotes many biochemical reactions in the body. Enzymes are specific. Only a given enzyme can catalyze a particular reaction.
Owing to the fact that enzymes function based on a lock and key model, When active site of an enzyme is damaged, it can no longer fit into its substrate hence, the reaction will continue through path X.
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what is acrosomal reaction???
Explanation:
it allows spermatoza to penetrate the zona pellucida and fuse with the oocyte membrane.
Answer:
The reaction between the acrosome of the sperm as a result of hydrolytic enzymes to enable the sperms to penetrate the egg
Explanation:
It allows the spermatozoa to go through the zona pellucida and fuse with the oocyte membrane for fertilization to take place
HELP ASAP ILL GIVE U BRAINLY AND POINTS! Need help with 19!
Answer:
9.56, if u need the calculations let me know
Explanation:
what is the scientific name of frog
Answer: Anura
Explanation:
Answer:
The scientific name for a frog is Anura.
During cell reproduction, inherited information is carried by.
genes
bacteria
cytoplasm
nuclei
Answer:
During cell reproduction, inherited information is carried by:
A. nuclei
B. bacteria
C. cytoplasm
D. genes
The answer is D genes
Explanation:
Mitosis and meiosis are cell division mechanisms that lead to different numbers of daughter cells. Which explanation best describes how these two processes maintain continuity?
meiosis :cell division that produces reproductive cells in sexually reproducing organisms
mitosis:cell division in which nucleus divides into nuclei containing the same number of chromosomes
meiosis nucleus divides twice and produces 4 daughter cells which are not genetically the same
mitosis necleus divides ones and produces two daughter cells which are genetically the same
17. When a person looks up into the sky
during new moon, what fraction of the
bright surface of the moon do we see?
Answer:
i dont really know why and how im here but im here
Explanation:
3. If the solute concentration in the water is high (hypertonic solution), does water move
into or out of the paramecium?
Answer:
its flows out
Explanation:
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easy 5th grade science please look at photo and answer!! giving brainliest
Answer:
What happens after water particles returns to the ocean is that it'll evaporate over the island, and precipitation happens :3
Explanation:
:3
In Drosophila, the genes for eye color, wing shape, and wing length are located on chromosome II. Purple eyes (pr), arc bent wings (a), and vestigial wings (vg) are the mutant forms of the wild type traits red eyes, straight wings, and long wings, respectively. You've discovered some data in your genetics laboratory which indicates that the distance between vg and pr is 12.5 m.u., the distance between a and pr is 44.7 m.u., and the distance between a and vg is 32.2 m.u. what is the chance of a double crossover between these three genes
Answer:
The expected double recombinant frequency = 0.0402 = 4.02%
Explanation:
Available data:
genes for eye color, wing shape, and wing length are located on the same chromosomePurple eyes (pr) is the mutant form of the wild type traits red eyes (pr+)Arc bent wings (a) is the mutant form of the straight wings (a+)Vestigial wings (vg) are the mutant forms of the long wings (vg+)the distance between vg and pr is 12.5 m.uthe distance between a and pr is 44.7 m.uthe distance between a and vg is 32.2 m.u→ Two genes that are very close will have a few recombination events and are strongly bounded.
→ The map unit is the distance between the pair of genes for which every 100 meiotic products, one of them results in a recombinant one.
1) First, we need to know their order in the chromosome, and to do so, we need to compare the distances between them.
The most distant pair is a-pr
----a---------------------------------------------pr---
║-------------------44,7 MU-------------║
From gene a to vg there are 32.2 MU
----a-----------------------------vg--------------pr---
║-------------------44,7 MU-------------║
║----------32.2 MU------║
Finally, de distance from vg to pr is 12.5 MU
----a-----------------------------vg--------------pr---
║-------------------44,7 MU---------------║
║----------32.2 MU------║--12.5 MU--║
We can name region I to the distance between a-vg, and region II to the distance between vg-pr.
2) To calculate the recombination frequency, we have to know that 1% of recombinations = 1 map unit = 1cM. And that the maximum recombination frequency is always 50%.
1 MU -----------1% of recombination
32.2 MU -----X = 32.2 % of recombination
12.5 MU-------X = 12.5 % of recombination
3) The expected double recombinant frequency = recombination frequency in region I x recombination frequency in region II.
The expected d. recombinant frequency = 32.2% x 12.5% = 0.322 x 0.125
The expected double recombinant frequency = 0.0402 = 4.02%
6. New experimental data does not support a currently accepted hypothesis. Which
course of action should the researcher take?
A) Do the experiment again.
B) Change the data to fit the hypothesis.
C) Form a new hypothesis and plan a new experiment
D) Change the procedure to obtain the desired outcome.
The _____ on the out side of the virus are "sticky" and attracted to specific molecules on the outside of animal cells. A. Protein Spikes B. Carbohydrate Molecules C. Cholesterol Markers
Answer:
A. Protein Spikes
Explanation:
A viruses are defined as the quintessential parasites in the living world. They are a chain of the nucleic acids that lives in a host cell. Without the host cell, all the viruses cannot carry out their life sustaining activities or functions. They are always housed in a protein layer or a protein coat. All the viruses contains the RNA or the DNA. The protein spikes which is on the outside of a virus are "sticky" and they are attracted to the specific molecules of the outside of an animal cells.
100 POINTS AND BRAINLIEST HELP PLS AWNSER THESE
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Cell Membrane-The protective barrier that encloses all cells and holds the cell together while allowing materials such as nutrients and wastes in and out the cell.
Cytoplasm-The syrup-like liquid that surrounds and protects the organelles inside of a cell.
Nuclues- is a membrane-bound organelle that contains the cell's chromosomes.
two example of epidemic diseases
Answer:
1) Chikungunya
2) Cholera
Explanation:
Answer:
1. Whooping cough
2. Smallpox
Explanation:
TRUE OR FALSE: DINOFLAGELLATES IS A GROUP OF BACTERIA THAT USED TO BE CLASSIFIED AS ALGAE
Answer: True
Explanation:
For traits controlled by a single genetic locus, dominant phenotypes are expected to occur at a frequency of approximately 75%, in a randomly mating population.
true or false and why
Answer:
True.
Explanation:
The dominant phenotypes are expected to occur at a frequency of approximately 75%, in a population because of its dominant nature which allows them to appear in the physical structure of the organisms. In most of the offspring, the dominant allele shows their characteristics in the population whereas the recessive allele are hidden in that organisms and we can't see them in the physical appearance of the organisms.