In what era did the humans appear
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Hominins first appear by around 6 million years ago, in the Miocene epoch, which ended about 5.3 million years ago. Our evolutionary path takes us through the Pliocene , the Pleistocene , and finally into the Holocene, starting about 12,000 years ago.
Which organelles are not found in plant cells? vacuoles mitochondria chloroplasts centrioles
Answer:
Centrioles
hope it help u
:) ✌❤
Answer:
D. centrioles
Explanation:
What prevents acetylcholine from accumulating in the neuromuscular junction and causing a sustained contraction in a normal individual
Answer:
Botulinum toxin
Explanation:
Botulinum toxin is known to hinder the release of acetylcholine into the synaptic cleft at the neuromuscular junction.
This leads to acetylcholine not attaching to its receptors and eventually leading to the inability to have muscle contractions.
Hence, in this case, the correct answer is Botulinum toxin prevents acetylcholine from accumulating in the neuromuscular junction in individuals.
structural adaptations of phloem
Answer:
strong
Explanation:
Answer:
The cells that make up the phloem are adapted to their function. Each sieve tube has a perforated end so its cytoplasm connects one cell to the next Companion cells. transport of substances in the phloem requires energy. One or more companion cells attached to each sieve tube provide this energy.
Explanation:
Which scientific discipline is correctly matched to a contribution to society?
The options are;
A) biology; theory of relativity
B) geology; theory of continental drift
C) ecology; discovering new elements
D) astronomy; developing quantum mechanics
Answer:
B) geology; theory of continental drift
Explanation:
Looking at the options;
-theory of relativity is a topic in physics originated by Einstein. Thus, it is matched to physics and not biology.
- theory of continental drifts are related to plate tectonics where it explains how continents shift position on Earth's surface. This is a branch of Geography and is thus correctly matched.
- discovering new elements is a topic under chemistry and not ecology. Thus, this is not matched correctly.
-developing quantum mechanics is a topic in physics that deals with the relationship between energy and matterwith respect to atomic and subatomic scale. Thus, it is not well matched.
Therefore correct answer is option B
What are the charges both inside and outside of the neuron before you click the stimulate neuron button?
Answer:
The correct approach is "Negative and Positive".
Explanation:
Just outside of the neurons, the electrostatic interactions seem to be extremely favorable or positive (+) as well as the ion mostly with the greatest proportion was indeed sodium. Throughout intracellular space, a large amount of protein would be negatively charged, or even just potassium channels predominate. Under those same circumstances, the ion channels also seem to be inaccessible.For this specific purpose, this same lying down the neuron, before obtaining a stimulus, introduces positively charged on the external social but instead negative (-) inside though.
How has cell technology most likely benefited the commercial flower industry?
- Growers can quickly grow disease-resistant plants from tissue cultures.
-Growers can study plant growth patterns under many different conditions.
-Growers can grow seedlings without using expensive fertilizers.
-Growers can create new flower colors without using cross-pollination.
Answer:
The answer is: Growers can quickly grow disease-resistant plants from tissue cultures.
Explanation:
Took the test.
The most likely benefit of cell technology to the commercial flower industry is that the growers can quickly grow disease-resistant plants from tissue cultures. Thus, the correct option is A.
What is Cell technology?Cell technology include all the major steps such as the production, reprogramming or genetic editing of cells for the development of cell therapies or for the therapeutics which are produced by cells.
Cell technology has been found to be helpful in the development of new varieties of crops, commercial flower industry, medicinal industry for the production of cell therapies and therapeutics as well. Cell technology has been helpful for the production of disease-resistant varieties of crops.
Therefore, the correct option is A.
Learn more about Cell technology here:
https://brainly.com/question/23616830
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3. On a particular planet, it takes 850 J for a 50 kg remote probe to launch
itself up 2 m. What is the gravitational field strength on the planet?
Answer:
the gravitational field strength is 8.5 N/kg .
Explanation:
PE = mgh
where,
PE is Potential Energy
m is the mass
g (a) is the acceleration
h is the height
Substitute the value we get
→ 850 = 50×a × 2
→ 850 = 100×a
→ a = 850/100
→ a = 8.5m/s²
Acceleration is 8.5m/s².
Now, Calculating the Gravitational Field Strength
Sodium (Na) and water (H20) undergo a chemical reaction
that produces sodium hydroxide (NaOH) and hydrogen gas
(H2).
Which equation represents this chemical reaction?
A. 2Na + 2H20 - 2NaOH + H2
B. 2Na+ H2 - 2NaOH + 2H20
C. 2Na + 2NaOH - 2H20 + H2
D. H2 + 2H20 - 2Na + 2NaOH
Answer:
2Na + 2H2O - 2NaOH + H2
Explanation:
WATER MOLECULE WILL BREAK INTO H AND OH
OH COMBINES WITH NA AND FORMS NAOH AND GIVES H2
If other beavers move to this area to build a dam, what is one need for which they are most likely competing?
Answer:
space adequate for building a shelter
Explanation:
edge 2021
What is the difference between a primary and secondary reinforcer?
Answer:
Primary reinforcer is innate, secondary reinforcer is a stimulus
Explanation:
While a primary reinforcer is innate, a secondary reinforcer is a stimulus that becomes reinforcing after being paired with a primary reinforcer, such as praise, treats, or money.
Hope this helps!
Brain-List?
Choose the equation that relates work to force and distance.
a
work =
force
distance
b
work
distance
force
c с
work = force x distance
d
work = force + distance
Answer:
c
Explanation:
work=force×distance
Answer: c
Explanation:
how many kilometers will the pacific plate travel in 1 million years
Answer:
201km in 1.8 million year( also mark me as brailiest)
A man heterozygous for blood type A marries a woman heterozygous for blood type B. What could be the possible blood types of their offspring?
Answer:
Heterozygous A: AO (remember, O type blood is a recessive allele. It's masked by A)
Heterozygous B: BB (h0m0zygous)
AO x BB --> AB, BO
Therefore, the genotypes of their offspring will be 1 AB to 1 BO, while the phenotypes will be 1 AB blood to 1 B blood.
I hope this answer helps you find what your looking for! :)
Answer:
Heterozygous A: AO (remember, O type blood is a recessive allele. It's masked by A)
Heterozygous B: BB (h0m0zygous)
AO x BB --> AB, BO
Therefore, the genotypes of their offspring will be 1 AB to 1 BO, while the phenotypes will be 1 AB blood to 1 B blood.
Explanation:
please mark as brainliest
55) Cells require which of the following to form cilia or flagella?
A) centrosomes
B) ribosomes
C) actin
D) A and B only
E) A, B, and C
Answer: D) A and B only
Explanation:
Centrosomes and Ribosomes are both present in the animal cell with both of them having different roles. Centrosomes have roles in cell divisions as they maintain chromosome number during the process and Ribosomes are in charge of the synthetization of proteins.
These two share a role together which is that they are both needed by the cell in order to form either cilia or flagella.
If the frequency of the disorder in the population is 0.0070, what is the percentage of heterozygous carriers
Answer:
15.322 %
Explanation:
Supposing that this is a recessive disorder and the population is in Hardy-Weinberg equilibrium:
p² + 2pq + q² = 1, where
1- the genotypic frequency of the homo-zygous dominant allele is p²,
2- the genotypic frequency homo-zygous recessive allele is q², and
3- the genotypic frequency heterozygous allele is 2pq
Therefore:
q² = 0.007 >> q = √ 0.007 = 0,0836
p = 1 - q = 1 - 0,0836 = 0.9164
2pq = 2 x 0.9164 x 0,0836 = 0.15322 (or 15.322 %)
The four types of macromolecules in cells are nucleic_________
lipids, proteins, and_____
The four types of macromolecules in cells are nucleic acids, lipids, proteins, and carbohydrates.
What differences can you see when you compare the nucleus of a dividing cell with that of a non-dividing cell?
Answer:
Explanation:
The difference you can see when you comparethe nucleus of a dividing cell with that of a nondividing cell is that chromosomeswill be seen in the nucleus of the dividing cell because they are visible when acell is dividing apposed to non-dividing cells.
Codons can be found in...
A.humans only B.rocks C.bacteria D.all
Answer:
A series of codons in part of a messenger RNA (mRNA) molecule. Each codon consists of three nucleotides, usually corresponding to a single amino acid. The nucleotides are abbreviated with the letters A, U, G and C.
Explanation:
Gizmo Warm-up
On the SIMULATION pane of the Cell Division GizmoTM, check that the Cycle Length is set
to 12 hours. Click Play ( ), observe until the maximum number of cells is shown, and
then click Pause ( ).
1. Look at the cells. Do they all look the same?
I
antakinerir
Answer: no
Explanation: some of the cells look the same but some don’t and this is basically saying that they are not all the same. There is like 4 different types of cells.
What is the purpose of having leak and gated channels for the neuron?
Answer:
Explanation:
The purpose of having leak and gated channels for the neuron is that the leak channels will allow the movement of sodium and potassium across the cell membrane downward from high concentration gradient to low concentration gradient. With the leakage of ions across the cell membrane, there is maintainence of a stable resting potential of cells.
help asap pls getting timed
Answer:
temp.
Explanation:
Answer:
tempurature
Explanation:
Which of these ideas would be the best course of action for decreasing land temperatures?
Answer:A
Explanation:
Please answer this is super easy 6th grade science! Thanks!
Answer:
The answer should be A. lithosphere.
Explanation:
Firstly, let's look at the options:
C. and D, both parts of the Earth at the core, have almost nothing to do with the Earth's crust or tectonic plates except maybe having a passive effect on them.
B. mantle is where the lava that moves the tectonic plates circulates due to convection, which is the reason they move at all. But, it is not where the tectonic plates themselves are.
Therefore, finally, we have A as the answer.
(As a sidenote, the "lithosphere" means the Earth's crust.)
Hope this helped!
___ is the process of producing cellular energy in the presence of oxygen.
Group of answer choices
aerobic
anaerobic
glycolysis
fermentation
Answer:
A aerobic is the answer
Explanation:
I took the test
it is a jelly-like fluid structure inside the cell that provides an area of movement for all dissolved molecules that keep the cell working
help !! Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which then generates an electric current. This electric current, in turn, allows the car to move. Which shows the correct order of energy transformations that take place in a solar-powered car?
A)electrical, chemical, kinetic
B)electrical, kinetic, radiant
C)radiant, chemical, electrical
D)radiant, electrical, mechanical
Answer:
Concept: Fuel Cells
First it goes through radiant which is the intake of the solar power as waves, aka electromagnetic.Then it goes through an electrical process that converts the acquired power.Lastly a car uses mechanical power to move.Answer: radiant, electrical, mechanical
Explanation:
took the quiz :)
Individuals of the same species that live in the same species that live in the same area_________
A-Ecosystem
B-organism
C-Ecology
D-species
E-abiotic
F-Biotic
G-community
H-population
Individuals of the same species that live in the same area is a population
The sensor or detector tells the integrating center what needs to be done
True
False
Answer:
True
Explanation:
It is true because a sensor or detector is an organ that detects external stimuli from the environment or changes in both internal and external environment, it then send the information to the integrating center.
The integrating center receive stimulus or information from sensor and activate responses to the stimulus.
How can traits affect fitness and how
can natural selection change the
presence of certain alleles over time?
Answer: Natural selection allows the survival of organisms with beneficial traits.
Explanation:
Natural selection can be defined as the differential survival and reproduction of the members of the population that have beneficial phenotypic traits to survive in unfavorable environment. These organisms reproduce and pass on their traits to the next generation such species does not extinct in future.
The natural selection allows evolution of species with the adaptation of new traits so as to allow the survival of the organism.