Answer:
Photosystems i and ii, predominately photosystem ii
Explanation:
I did the test
The internal systems of organisms and how materials circulate within organisms. Question 4 options: organ tissue Living System homeostasis
Answer:
Living System
Explanation:
Living system can be defined as the internal systems of organisms and how materials circulate within organisms.
Generally, these living systems are self-organized life forms and are known to be very much interactive with their surroundings or environment. Also, living systems are dependent on the flow of information, matter and energy at various levels.
Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.
Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc.
Answer:
Living system is correct!
Explanation:
I took the test!
3. How many membranes does the
nucleus have?
Answer:
2 membrans
Explanation:
Why enzymes of bacteria are not destroyed while the enzymes of plant destroyed at 78 C
Answer:
i need more information to answer this
Explanation:
Answer:
the enzymes in the bacteria are more heat tolerant
Explanation:
please help me with this homework question!
Answer:
Tt and tt
Explanation:
To solve this just work backwards. The first box has Tt so one parent has to have T and the other t. Since the tall plant is on the top, it is T_ and t_. Next use the second box (tt). They are both t so the final answer is Tt x tt.
Explain why DNA is important to life on Earth.
Answer: Deoxyribonucleic Acid (DNA) is the basic building blocks of life on earth.
Explanation: DNA contains all kinds of genetic information in which the cell uses as instructions for the new organism. DNA makes up what traits the offspring will inherit. This is upto and including diseases, birth defects, eye color, learning disabilities, chemical imbalances (yes, depression is a chemical imbalance and therefore can be inherited). DNA controls many aspects of your daily life without you even knowing it.
Which of the following is NOT a man-made activity that increases the atmospheric heat?
A. burning
B. deforestation
C. dumping waste
D.reforestation
Answer:
D is the answer okkkkkkkkkkkkkkkk
Which structure is present during cell division in plant cells that is not present in animal cells?
Answer:
Cell Wall
Chloroplast
Large Vaculoe
Explanation:
None of these are found in an animal cell.
I need the answer to number 8 please :)
Answer:
A. is Plantae
B- Fungi
C- Bacteria
D- Animalia
Answer:
a) Plantae
b) Protista
c) Fungi
d) Animalia
Explanation:
Plantae - Plants
Fungi - Mushrooms
Protista - Eukaryotic organisms
Animalia - Fish
How could an asteroid impact have led to the extinction of dinosaurs?
Answer:
The asteroid crashed into the earth and made some water bodies violent
it is said that the asteroid was super huge and was capable of causing volcanoes, tsunamis, etc which took place all over the earth and extincted dinosours. But it is a little surprising that crocodiles who were also found at that time survived all this
Answer:
Probably the asteroid caused natural calamities
How does meiosis play a role in the evolution of a species
A. It increases the reproduction rate of the species
B.it increases the amount of genetic variation in the species
C. It reduces the amount of competition between members of the species
D. It increases the ability of individuals in the species to obtain resources
Answer:
The correct answer is - option B. it increases the amount of genetic variation in the species.
Explanation:
Meiosis is a type of cell division that takes place in sex cells or reproductive cells. There is crossing over takes place which is a process where the genetic exchange of chromosomes occurs between non-sister chromatids of homologous chromosomes.
The crossing over leads to the new genetic combinations of genetic material which result in the genetic variation in species. This variation plays a role in the natural selection and evolution of species.
If RrYy is crossed with another organism with the genotype RrYy, what would be the expected phenotypic ratio of
the F1 generation
Explanation:
TRICKY Q.
ACCORDING TO ME:
P1 ---> RrYy n RrYy
F1 ----> RY , RY , ry , ry hence 1:1:2:2
IN DIHYBRID CROSS
PHENOTYPIC RATIO : 9:3:3:1 FOR F2 GENERATION
GENOTYPIC RATIO : 1:2:2:4:2:2:1:1:1 FOR F2 GENERATION
GOOD LUCK FOR FUTURE! :)
4. Some groups of organisms move from colder climates to warmer climates at
certain points of the year. This behavior is known as
A. adaptation
B. reproduction
C. migration
D. hibernation
If a human body cell has 23 pairs of chromosomes, how many
total chromosomes are in a human body cell?
a
12
b 23
C46
d 52
Answer:
46
Explanation:
Every cell in the human body contains 23 pairs of such chromosomes; our diploid number is therefore 46, our 'haploid' number 23. Of the 23 pairs,
Hi, please answer this
Also for the last box the options is either 24 hours of darkness or 24 hours of daylight
Answer: I wanna say that’s right
Explanation:
Which kingdoms include organisms that create cellular energy (ATP) through respiration?
I. Archaebacteria
II. Fungi
III. Plantae
IV. Animalia
V. Protista
VI. Eubacteria
A.
II and IV only
B.
I and VI only
C.
I, II, IV, V, and VI only
D.
I, II, III, IV, V, and VI
Answer:
D.
I, II, III, IV, V, and VI
the remains of once-living organisms are called what
which statement correctly describes how the amount of ofoxygen in the earth’s atmosphere has changed over time?
Answer:
Based on the relative volumes of the gases in Earth’s atmosphere, nitrogen is actually more than 3 times more than oxygen. Because the troposphere is the lowest atmosphere layer, it contains 75 percent of the atmosphere’s mass.. From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO 2 and trace gases.
Explanation:
Select the best answer for the question.
3. In an offspring set, there are two organisms with lobed ears (LI) and two organisms with unlobed ears (II). What is the likely genotype and
phenotype of the unknown parents?
Note about the question:
Options are missing in the problem statement, and I failed in finding them. However, here is my answer and explanation.
Answer:
• Genotype: Ll and ll
• Phenotype: One parent has lobed-ears (Ll) and the other one has
unlobed-ears (ll)
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
Scientists have noticed that the entire DNA molecule has the same width, despite the fact that the four nucleotides are NOT the same width Now that you’ve created a model, explain why this makes sense (hint: it has to do with the number of rings for each nitrogen base)
I don't have access to your model, although I'm sure it's beautiful. Fortunately, this question can be answered without one.
A strand of DNA is a polymer consisting of monomeric nucleotide units. The nucleotides that are found in DNA are distinguished by their nucleobases: adenine (A), thymine (T), guanine (G), and cytosine (C). Each nucleotide in DNA is made up of a single nucleobase, a sugar (deoxyribose), and a phosphate group. These nucleotides form extremely long chains comprising phosphate-sugar linkages (covalent, phosphodiester bonds).
In native, double-stranded DNA, you have of these chains (or strands) arranged side-by-side such that the nucleobases on one chain are faced directly across corresponding nucleobases on the other chain, which enables hydrogen bonding between the bases.
There is a "rule" regarding which bases form hydrogen bonds with one another (Chargaff's rule): adenine with thymine and guanine with cytosine.
What does this have to do with the width of the DNA molecule?
The four nucleotides can be structurally classified into two categories: pyrimidines and purines. For our purposes, we only need to know that pyrimidines are six-membered rings and purines are a fusion of a six- and five-membered ring (basically, purines are pyrimidines attached to a five-membered ring). Thymine and cytosine are pyrimidines, and adenine and guanine are purines.
So, geometrically, adenine and guanine are larger (and, thus, "wider") than thymine and cytosine since adenine and guanine contain an extra ring. But remember our base-pairing rules: In native DNA, adenine (two rings) on one strand pairs up with thymine (one ring) on the other strand, and guanine (two rings) pairs up with cytosine (one ring) on the other strand.
Because there's a 1:1 ratio between A:T and G:C in double-stranded DNA, the DNA molecule consists of complementary base pairs that, in any given composition of, has equivalent widths. Put simply, the A=T pair has the same width as a G≡C pair because both base pairs are between one pyrimidine and one purine.
DNA (Deoxyribonucleic acid) is composed of four nucleotides, namely, adenine, guanine, cytosine, and thymine.
Adenine and guanine are purines while Cytosine and thymine are pyrimidines.Purines are composed of two rings while pyrimidines are composed of only one ring.Purine forms bond with pyrimidine, i.e Adenine binds with thymine and guanine binds with cytosine.Adenine and thymine form two hydrogen bonds while guanine and cytosine form three hydrogen bonds.Thus, the relative pairing of the purine and pyrimidine with each other keeps the width of the DNA constant.
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What is the BEST explanation for why grizzly bears are successful in a wide variety of ecosystems?
1. Grizzly bears are large omnivores that hibernate during the winter, so they do not need as much food as you think
2. Grizzly bears are large omnivores that can survive on plants, berries, and small and large mammals.
3. Grizzly bears are large and powerful and prey on large animals for food.
4. Grizzly bears are smart and always know where to find food.
Answer:
SCIENTIFIC NAME: Ursus arctos horribilis
TYPE: Mammals
DIET: Omnivore
AVERAGE LIFE SPAN IN THE WILD: 25 years
SIZE: Five to eight feet
WEIGHT: 800 pounds
SIZE RELATIVE TO A 6-FT MAN:
3. For each phenotype below, list the genotypes (remember to use the letter of the dominant trait)
Straight hair is dominant to curly Tail spikes are dominant to plain tails
straight
spikes
straight
spikes
curly
plain
Answer:
See the answer below
Explanation:
Let the allele for hair color be A (a) and the allele for tail shape be B (b). Straight hair A is dominant over curly hair a and spikes B is dominant over plain tails b. Hence, the phenotypes and their respective genotypes would be as follows:
Phenotype Genotypes
Straight hair AA or AaSpikes BB or BbCurly aaPlain bb What 2 chemicals are inside skeletal muscle?
Answer:
Skeletal muscle tissue is composed of cells called muscle fibers. When the nervous system signal reaches the neuromuscular junction a chemical message is released by the motor neuron. The chemical message, a neurotransmitter called acetylcholine, binds to receptors on the outside of the muscle fiber.
The 2 chemicals inside skeletal muscle are : i) Organophosphate ( OP ) and ii) Acetylcholine ( ACh )
The skeletal muscle is toxic in nature due to the presence of certain chemicals ( Organophosphate and Acetylcholine ). and this causes the skeletal muscle to experience some level of toxicity. some of the toxic effects caused by the presence of these chemicals in the skeletal muscle include :
weakness of the muscle.partial/complete paralysis.muscle hyperactivity.Hence we can conclude that the 2 chemicals that can be found inside skeletal muscle are Organophosphate ( OP ) and Acetylcholine ( ACh )
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3. Which of the following plant adaptations give evidence that herbivores have caused (or have driven) evolution
in some plant species to protect themselves against being eaten? Select the best two answer choices
the ability to climb
O the production of toxic chemicals
thors
mechanisms for seed dispersal
© sweet fruits
brightly-colored flowers
Answer:
The production of toxic chemicals
Thorns
Explanation:
Earthy, shiny, waxy, metallic, and pearly are terms used to describe a mineral's luster.
What might a scientist observe about a mineral that would help the scientist classify the
luster as metallic?
We have that for the Question it can be said that
Shinny minerals a conclusion of reflective properties will be madeIf the mineral is smooth and looks like glassThese properties of the luster might help the scientist classify the luster as metallic.
From the question we are told
Earthy, shiny, waxy, metallic, and pearly are terms used to describe a mineral's luster.
What might a scientist observe about a mineral that would help the scientist classify the
luster as metallic?
Generally
Shinny minerals a conclusion of reflective properties will be madeIf the mineral is smooth and looks like glassTherefore
These properties of the luster might help the scientist classify the luster as metallic.
Shinny minerals a conclusion of reflective properties will be madeIf the mineral is smooth and looks like glass
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PLEASE HELP IF YOU DONT KNOW DONT ANSWER OK THAT NOT WHAT THIS APP IS INTENDED FOR PLEASE GO BY THE RULE OR YOU FACE CONSEQUENCES!!!!
There are 10 pieces of candy in a bowl and 2 of them are chocolate. What percentage of the pieces of candy in the bowl are chocolate?
Answer:
20%
Explanation:
2 out of 10 is the same as 20 out of 100. So 2/10 = 2/100 or 20%
How does artificial salmon breeding affect the native Populations? What challenges do ecologists and conservationists face in the salmon industry ?
Answer:
When a long-term environmental change occurs, certain individuals in a population will be better adapted for the new environment than others. These individuals will be more likely to survive and pass on their traits to their offspring. Over many generations, these favorable adaptations build up in a population. This may lead to speciation, which is the development of a new species.
Explanation:
Ionic bonds are formed between _____ and involved the ____ of ions
Answer:
An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.
:
Choose one other region. Describe how that area will be affected by climate change
Answer:
When the global temperature changes, the changes in climate are not expected to be uniform across the Earth. In particular, land areas change more quickly than oceans, and northern high latitudes change more quickly than the tropics, and the margins of biome regions change faster than do their cores.
I hope it's helpful!
Explain how diffusion is used to support the life processes of animals. Your answer should include two named substances and two different areas of the body.
Please help.