Answer:
- Most animals have the capacity for active movement
- Animal zygotes undergo mitotic divisions called cleavage
- All animals are heterotrophs
Explanation:
Animals, also known as metazoans, are multicellular eukaryotic organisms from the kingdom Animalia. Animals are a monophyletic group, i.e., all animals are derived from a common ancestor. Animals can be classified into two main groups: 1- invertebrates that don't have a backbone inside their body (e.g., earthworms, octopus, snails, insects, etc) and 2-vertebrates that have a backbone inside their body (e.g., fish, amphibians, reptiles, birds, mammals). Cleavage refers to the division of animal cells in the early embryo. In animals, the zygotic cell divides by mitosis (i.e., cleavage), into smaller cells called blastomeres. Some of the most common characteristics of the animal kingdom are:
- heterotrophy: animals cannot produce their own food and obtain energy by feeding organic material present in other organisms
- generally reproduce through sexual reproduction
- animal's cells do not have cell walls
- they are able to move in almost one stage of their lives
- they can respond to external stimuli by nerve cells and/or muscle cells
which process is needed for evolution to occur? PLEASSE HELPPP THIS IS A BIG GRADE
Answer: D. Genetic mutation
Explanation:
For evolution to occur, there must be a genetic mutation in the genome of an organism such that a new allele is formed.
If this mutation occurred in the sperm and/or the ovum, the mutation will then be passed on through reproduction to the next generation. This leads to more of the subsequent generations having that mutation thereby leading to evolution.
Which human activity is correctly paired with the greenhouse gas that it increases?
A)rice cultivation and water vapor
B)landfilling and carbon dioxide
C)deforestation and methane
D)sewage treatment and nitrous oxide
The answer is (D) now on edge 2021
Answer:
the answer for ur question is D
In the liver, excess amino acids are broken down into ____________ and rapidly combine with ____________ to produce urea, which is much less toxic to cells.
Answer:
In the liver, excess amino acids are broken down into ammonia and rapidly combine with carbon dioxide to produce urea, which is much less toxic to cells.
Explanation:
The correct answer to the given quested about Urea Cycle is Ammonia and Carbon dioxide respectively and the complete statement will be "In the liver, excess amino acids are broken down into Ammonia and rapidly combine with Carbon Dioxide to produce urea, which is much less toxic to cells."
What do you mean by Urea Cycle?The urea cycle, commonly referred to as the ornithine cycle, is a series of metabolic processes that converts ammonia into urea (NH2)2CO (NH3).Highly poisonous ammonia is transformed into urea by rapidly combining with carbon dioxide via the urea cycle for elimination. Five years before the TCA cycle was found, this cycle was the first to be identified as a metabolic process. Later, Ratner and Cohen provided a more thorough explanation of this cycle.Thus we can conclude that in the liver, excess amino acids are broken down into Ammonia which is highly toxic to cells and that ammonia rapidly combine with Carbon Dioxide to produce urea, which is much less toxic to cells.
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Which of the diagrams best represents the structure of the nervous system
I’ll mark brainiest if right
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Answer: A) The 2 different ecosystems of green and brown plants
Explanation:
This is the independent variable because it will change the dependant variable of which how many brown and green beetles survive.
I hope this helped!
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- Zack Slocum
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CO2 + H20 + light energy --> C6H12O6 + O2
In the chemical reaction above, what does CoH12O6represent?
Answer:
In the chemical reaction , [tex]C_6H_1_2O_6[/tex] represent glucose.
Explanation:
This chemical reaction is used in the process of photosynthesis . A plant absorbs water, carbon dioxide, and light energy when producing glucose and oxygen during photosynthesis. Since glucose is required for cellular respiration, it is extremely essential. The chemical energy in the glucose molecule is transformed into a shape that the plant can use for growth and reproduction during cellular respiration.
Hence , the answer of the given question is Glucose.
Which is the main function of the respiratory system?
1. to protect the internal organs
2. to help oxygen get into blood vessels
3. to push blood to all parts of the body
4. to protect the body from illness
What part of the endocrine system does hypoglycaemia affect?
What are the possible genotypes for a tall plant
describe how carbon dioxide is produced by respiring muscle cells reaches the alveolar cavitiesin mammalian lungs
Answer:
Hope this helps:
The carbon (iv) oxide which has been produced by the respiring muscle tissue is diffused into the bloodstream in the form of bicarbonates, a process facilitated by an enzyme called carbonic anhydrase. The carbon (iv) oxide is then carried to the lungs.
Explanation:
Nick made the chart below to show the future impact of four energy production
technologies on the environment.
Tidal
Power
Current
power
Increase
in severe
Impact on weather
environment.
For which of these energy production technologies did Nick write a correct future
impact on the environment?
A. Current Power
B.tidal power
C. Wave power
D. Ocean thermal energy
Answer: Tidal Power
Explanation: correct on test
What is the name of the structures at the end of the bronchioles where gases are
exchanged?
Olarynx
Oalveoli
O trachea
Oepiglottis
Answer:
Alveoli
Explanation:
Below is the ORIGINAL stretch of DNA, followed by DNA which has a MUTATION. Will this mutation likely have a bad consequence for the organism? Why?
Original: GCU ACC AGG
MUTATED: GCU ACT AGG
This mutation likely have a bad consequence for the organism - No, because the mutation will not code for a different amino acid.
Amino acid sequences are formed by the translation and transcription from DNA sequence to mRNA and finally amino acid sequences.
Differences in amino acids chains can lead to differences in a protein (in shape and function).the protein may not be functional if the amino acid sequence is changed.It could lead to positive, neutral, or negative changes.In the given case the change in mutated from the original is ACC to ACTBoth ACC to ACT codes for glutamic acid.Thus, this mutation will not change the amino acid so the answer will be No.
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Not all fat cells are equivalent. Humans and other animals contain both white fat cells and brown fat cells, named after their color. Because increases in brown fat cells may aid weight loss, researchers are interested in factors that control the ratio of white fat cells and brown fat cells, as detailed in a 2017 article in Obesity Reviews. What is the mechanism for how brown fat cells aid weight loss
Answer:
Brown fat cells are present in our body which helps in regulating the body weight. The main role of brown fat is to produce heat when the temperature of body is going down or when we are feeling cold. They burn energy in order to produce heat and burning energy comes from white fat which can be translated into weight loss. This is how the brown fat helps in weight management.
The brown fat is activated by cold temperatures and it helps our body fast our metabolism by providing heat by burning energy.
Use a Punnett square diagram to show why, for each pregnancy, the chances of giving birth to either a boy or a girl are 50-50. Explain the results shown in your diagram.
Answer:
Because the offspring of a male and female are always going to be xx, xx, xy, or xy.
Explanation:
Remember that men have different reproductive chromesomes than women. Women have 2 x chromesomes(xx) while men have 1 x and 1 y(xy). These are given down to their offspring.
So we can write the this out in a punnet square as(link down below).
After you see the visual, you will find that the genotypes are xx, xx, xy, xy.
As I said above, women have sex chromesomes xx, while men have sex chromesomes xy. When you match the genotypes on the punnet square with the ones we know from men and women, we find that two of them match with men and two match with female.
So with this, we can conclude that 2/4 of offspring will always be male and 2 will be female. And as you well know 2/4 is 1/2 which is 50%.
3. A branched diagram showing relationships between organisms is a/an– a. amino acid sequence. b. fossil record. c. cladogram. d. DNA sequence.
Answer: your answer would be B
Explanation:
A branched diagram showing relationships between organisms is a cladogram. The correct option is c.
What are the uses of cladogram?An evolutionary tree that depicts the relationships between species' ancestors is called a cladogram.
In the past, cladograms were created using similarities among species' phenotypic or physical characteristics. Today, cladograms can also be created using similarities among organisms' DNA sequences.
A cladogram employs lines that diverge and then converge at a clade, a collection of creatures with a recent common ancestor.
Cladograms come in a variety of shapes, but they all contain lines that diverge from other lines. It is possible to follow the lines back to where they split off.
Cladograms provide a framework for comprehending the rate of evolution of groupings of animals as well as the relationship between their evolutionary history and the planet's changing climate and geography.
Thus, the correct option is c.
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If glucose is metabolized under completely anaerobic conditions, pyruvate ( Please explain why each answer is wrong or right.)
a. immediately enters the Krebs cycle.
b. is converted by fermentation to lactate or CO2 and ethanol.
c. is converted back to fructose until the concentration of oxygen increases.
d. is converted to NADH.
Answer:
B.
Explanation:
A is wrong because pyruvate would enter the Krebs cycle under aerobic condition (when oxygen is present). Hence the name aerobic cellular respiration
C. I do not really too much about fructose or the concentration of oxygen, but I can assure that this answer choice is not correct.
D is wrong because NADH would be converted from NADP+. Either with oxidation or reduction, and this helps to keep this process going.
B is correct because fermentation is another word for anaerobic cellular respiration. The process takes place with the absence of oxygen. It either goes through Alcoholic or lactic acid fermentation.
I hope this helps!
All the different populations living in the same habitat or ecosystem make up _____ A.biodiversity
B.ecosystem diversity
C.genetic diversity
D.species diversity
Answer:
D.species diversity
Explanation:
its D because biodiversity,includes to all the many plants, animals, fungi, and microorganisms. And includes the many variety of ecosystems what's found on Earth. Ecosystem diversity, describes all of the different type of habitats around the world.
*Question 23
Nerve impulses leading to the brain carry information about cool temperatures on the skin. The nerve fibers sending these signals will most likely belong to which division of the nervous system?
A) Somatic nervous system.
B) Parasympathetic division
C) Sympathetic division
D) Sensory (afferent) division
the answer is sensory (afferent) division
You are a botanist hired in the future to make a distant planet, Xyloph, habitable for human life. Your job is to help seed the planet with plant life by working with the terraforming team. All four major kinds of plants will be introduced into this new world. You are to help familiarize the terraforming team with the four different kinds of plants on earth. In three well developed paragraphs, describe each of the four major plant groups (seedless vascular, nonvascular, angiosperms, and gymnosperms). Your description should include, but not be limited to, the following: Description of general physical features and characteristics of each plant group. Discussion of living conditions where each plant group survives best. Explanation of specific abiotic conditions necessary for the success of that group, when applicable.
Answer:
A series of missions to the moons of Jupiter and Saturn has revealed their potential to harbour life. Nina Notman looks to the skies
After a series of mission failures, July 1965 saw the first successful flybys of Mars. The US Mariner 4 became the first spacecraft to take close up pictures of another planet, beaming 22 images of the impact-cratered Martian surface back to Earth. Since then, more than 20 successful missions have explored the red plant’s atmosphere and surface.
Thanks to the images and data collected– and by telescopes, both on earth and in space – we now know that billions of years ago, Mars had the three critical ingredients for life. It had an abundance of the chemical building blocks, liquid water on its surface and an energy source (volcanic activity) to power the chemical reactions that make life possible (on Earth that energy source is the sun). Today, the inhospitable surface of Mars is thought to be unsuitable for life, but the possibility of life existing deep beneath its frozen surface hasn’t been ruled out. To date though, no evidence of life – ancient or otherwise – has been found. Mars being habitable, it turns out, doesn’t mean it actually has a habitat.
Source: NASA/JPL-Caltech/MSSS
Mars has all the ingredients for life – water, chemicals and energy – but no signs of living things yet
The search for Martian life is ongoing, with a further three missions to Mars planned to launch over the next few years. Longer-term, a number of space agencies are also aiming to collect samples from Mars and return them to Earth for more in-depth analysis. And the search for signs of extraterrestrial life is stretching to the depths of our solar system and beyond.
question 10
Norepinephrine is produced from
A. tyrosine
B. serotonin
C. epinephrine
D. damfino
E. tryptophan
F. histidine
Before a cell divides, the DNA is checked to make sure it replicated correctly. This
piece of DNA is an exact copy of the DNA from which it came. When the parent cell
divided to create two cells, the cell's DNA also divide creating two identical copies of
the original DNA. What will happen if the DNA does not copy itself correctly?
Answer:
the cell will die
Explanation:
its chromosomes, an enzyme called cyclin dependent kinase, or CDK, will not activate the cyclin, and the cell cycle will not proceed to the next phase. The cell will undergo cell death
Key Term Matching
1. accessory organs
2. fundus
3. uvula
4. villi
5. large intestine
6. root
7. dentin
8. lamina propria
9. fauces
10. chyme
11. incisor
12. parietal cells
13. crown
14. stomach
15. cheeks
16. serosa
17. enamel
18. stratified squamous
19. gingivae
20. small intestine
21. pharynx
22. liver
23. molar
24. mucins
25. acinar cells
a. forms bulk of tooth
b. performs compaction
c. a cutting tooth villi
d. liquid food mixture in stomach
e. posterior opening of oral cavity
f. has three muscularis externa layers
g. portion of tooth above gum line
h. epithelium found in esophagus
i. are connected to GI tract by a duct
j. composed of loose connective tissue
k. dome-shaped stomach region
l. organ shared with respiratory system
m. substance harder than bone
n. exocrine part of pancreas
o. projection off of soft palate
p. in saliva to lubricate food
q. finger-like extensions of mucosa
r. portion of tooth below gum line
s. the gums
t. performs 90% of digestion and absorption
u. secretes bile
v. a grinding tooth
w. secrete HCI
x. outermost layer of GI tract wall
y. lateral walls of the oral cavity
In which season did the rabbit population increase the least
Answer:
Winter
Explanation:
Answer:
During the winter season
If nondisjunction occurs during meiosis II, how many of the daughter cells will have an incorrect number of
chromosomes?
3. The presence of Malaria in many countries has been eradicated and even in parts of Africa, the incidence of Malaria has been reduced substantially. Without endemic malaria from Africa, the sickle cell mutation is purely disadvantageous. What do you think will happen to the percentage of people carrying the Sickle Cell gene over time under the pressures of natural selection
Answer:
The percentage of people carrying sickle cell gene increases.
Explanation:
People carrying the Sickle Cell gene have low chance of Malaria because the sickle cell enables the body to detoxify abnormal red blood cells from the body. When the malarial parasite attacks on the cells of the body, the molecular machinery for cleaning up the waste is already present in the body. Those places where malaria is common, the people having sickle cell because the sickle cell show resistance against malarial disease.
Micro arthropod is
(a) Scabies mite
(b) spirogyra
(c) Amoeba
(d) Yeast
Answer:
Scabies Mites are Micro Arthopods
Jenny has red hair and freckles. We know that non-red hair (R) is dominant to red hair (r), and that freckles (F) are dominant to plain skin (f). She tells you that her mom has brown hair and freckles, and that her dad has red hair and plain skin. Furthermore, she says that her maternal grandmother (her mom’s mom) had red hair and plain skin. What is Jenny’s genotype?
Hello Milan!
Answer:
rrFf
Explanation:
In this question, we’re talking about two traits, which means that we will represent their genotypes with four letters ( two letters for each trait, since one trait is present in two chromosomes -pair-, one from the mother, and one from the father, revise if you don't get it, or just ask me).
First, let’s make everything clear:
Capital letters are for dominant traits (if one dominant trait is present in the genotype, it will be shown as the phenotype of a person)
Small letters are for recessive traits (if both chromosomes have the recessive trait, it will be shown as the phenotype)
( one letter = one allele )
R : not-red hair r : red hair
F : freckles f : plain skin
Second, let's write down every possible genotype for each person:
Let's start with Jenny, she has a recessive trait (red hair) and a dominant trait (freckles). As I mentioned before, we will represent recessive traits in two small letters ( rr for Jenny's red hair ). And in the case of our dominant trait ( freckles), we MUST have at least one capital letter (for this trait: F ). That means we have two possible genotypes for freckles: either Ff or FF.
Now as easy as it sounds, we should write Jenny's possible genotypes like this:
Either rrFf or rrFF
Jenny's mother has brown hair and freckles (two dominant traits), again, as I mentioned before, dominant traits MUST be represented by at least one capital letter.
Possible genotypes for brown hair:
either RR or Rr
Possible genotypes for freckles:
either FF or Ff
Here, we have the phenotype of one parent of Jenny's mother's parents. Lucky for us, Jenny's grandmother has two recessive traits that can only be presented as rrff.
Why are we lucky? Because Jenny's mother must have inherited one allele of her grandmother, since both of Jenny's grandmother's alleles are the same, we know that Jenny's mother has one r allele and one f allele. We can write down Jenny's mother's genotype like this: RrFf.
Now I ask you to stop reading and try to figure out Jenny's father's genotype.
It is rrff, just like her grandmother.
Finally, let's make a Punnett square for Jenny's genotype:
mother: father:
RrFf x rrff
( I'm not gonna show you how to make a Punnett square because that's gonna be a tooooooo long explanation, watch this video: https://youtu.be/qIGXTJLrLf8 )
possible genotypes for Jenny and her siblings:
RrFf (phenotype: non-red hair & freckles)
or Rrff (phenotype: non-red h & plain skin)
or rrFf (phenotype: red h & freckles)
or rrff (phenotype: red h & plain face)
If Jenny has red hair and freckles, she MUST have a genotype of rrFf. If not, her mother is cheating XD (or a genetic mutation had happened).
I know I took too long explaining and answering but I hope I helped you,
keep it up!!
The correct genotype Jenny would be - rrFf .
The information we have in this question is:
non-red hair (R) is dominant to red hair (r),freckles (F) are dominant to plain skin (f).dad has red hair and plain skinmom has brown hair and freckles,Jenny has red hair and frecklesmaternal grandmother had red hair and plain skinLet find the genome of her maternal grandmother:
Her maternal grandmother had red hair skin which is a recessive trait and plain skin which is also a recessive trait that means she must have both recessive alleles for each trait as recessive allele express itself in the absence of dominant allele
The genotype of maternal grandmother: rrff
Let find the genome of the mother:
Mother has brown hair and freckles and brown hair is only present in heterozygous conditions if R allele is present with r allele however, Freckles can be in two conditions FF or Ff. The mother of jenny's mother has rrff then she must carry one f allele which concludes that Jenny mother has Ff.
The genotype of mother: RrFf
Let find the genome of her father:
Her father has red hair and plain skin and as we explained that both are recessive traits then the genotype of her father would be - rrff
Finally, the genotype of jenny can find out by the cross between the genotype of her parents:
(see image for cross)
The genotype of Jenny would be rrFf as red skin is a recessive trait that is only possible with two recessive alleles and for the freckles, there are two possible conditions, Ff and FF that can find out by crossing given in the image.
Thus, the genotype of Jenny is - rrFf
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The smaller a population of organisms of a particular species, the
A.
more likely one of the organisms is to adapt to a changing environment
B.
more likely a mutation is to arise
C.
less likely the species will be able to survive in a changing environment
D.
less likely natural selection is to affect the population
Answer:
The correct answer is - D. less likely natural selection is to affect the population
Explanation:
The larger population of a species tends to produce more mutant individuals per generation than a smaller population per generation. In a larger population, it assists to get more genotypes and gets optimal genotypes quicker than smaller populations.
In larger populations, the process of natural selection is more effective and for the smaller population Second, natural selection is less likely to affect the population which leads to less genetic diversity or change in order to survive due to stochastic sampling error as some allele loss in random selection.
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
Answer:A
Explanation:
Trust me bro