While working in labs with chemicals or specimens one should follow good laboratory practices. Professional conduct and manner should be maintained during working in labs.
The action that should be taken by a student is:
Option B. Wear a lab apron or lab coat over the clothing.
The good lab practices can be explained as:
To avoid staining clothes individuals should wear lab coats over their clothes.Lab coats avoid staining and splashing your skin and clothes from chemicals and dyes.Lab coats are designed to protect against corrosive chemicals from soaking into the skin.Therefore, the student should wear lab coats and aprons.
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Answer:
B
Explanation:
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in an experiment describe photosynthesis
Scientists put a sample of water into a sealed tank. Water can be a solid, liquid, or gas. At first, the water was a liquid. Then, the scientists transferred energy out of the substance, and the water changed phase. What happened to the movement of the water molecules?
After the phase change, the water molecules moved . . .
Answer:
slower and started moving in place
Explanation:
if one cell undergoes mitotic division every 3 minutes and 18 minutes pass, how many cells will have been created?
Answer:
6
Explanation:
if there is one cell that is being created every 3 mins, then you would divide 18 by 3 and get 6.
Answer:
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Explanation:
Que derivados del petróleo se utilizan en la fabricación de materiales deportivos?
Answer:
Explanation:
*Which statement best explains the main conflict and resolution in "How a Cat Played Robinson Crusoe"?
The cat is abandoned on an island. She adapts to the wilderness and survives until her family returns.
The family worries about the cat. They are overjoyed to discover that the cat is alive when they return.
The cat faces many adversaries, including rats and owls. However, she persists and is able to overcome each.
The cat learns how to hunt. She does not starve to death on the island.
differences between treatment outcomes for different populations are known as:
Answer:
Differences between treatment outcomes for different populations are known as health care disparities.
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A(n) _______________ is a small box with a glass lid that catches the heat of the Sun. It is coated with black metal to absorb the heat and insulated to keep heat from escaping.
solar battery
solar cell
solar grill
solar oven
Answer:
Well, its a solar cooker but the anwser is solar oven
Explanation:
Are there other types of cells other than prokaryotic and eukaryotic cells?
Answer: No there is not im pretty sure there are only those two cell types.
Explanation:
state three reasons why children resemble their parents
Answer:
Parents are the only reason our children are alive. Our parents are the reason we exist. Parents try their hardest to take care if their children.
Explanation:
why are there no identical individuals among humans?
Answer: Numerous contrasts between people are without a doubt a direct result of contrasts in their qualities. ... People vary, obviously, on the grounds that natural cycles are intrinsically factor.
Explanation:
A typical leaf is composed of multiple layers of specialized cells. What is the correct order of layers starting on the upper surface of the leaf and progressing to the lower surface?
Answer: cuticle - epidermis - palisade mesophyll - spongy mesophyll- epidermis - cuticle
Explanation:
heat moves through the atmosphere through the process of ?
Answer:
Heat moves through the atmosphere through the process of Conduction.
Explanation:
Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface.
Compound use by cells to store and release energy
Answer:
Adenosine triphosphate (ATP) is a chemical compound cells use to store and release energy. An ATP molecule consists of adenine, the sugar ribose, and three phosphate groups.
Give an example of an adaptation
An adaptation is any characteristic that helps a plant or animal survive in its environment. A penguin's feathers are an adaptation. For example, animals that live in cold places have adaptations to keep them warm. Plants that live in dry areas have adaptations to help them conserve water.
Answer:
Adapting to a new environment is an example of adaptation.
Explanation:
Adaptation means to be able to adjust to something new.
Briefly summarize the structure of a fern
Answer:
The structure of a fern. Ferns have 3 major parts – the rhizome, the fronds and the reproductive structures called sporangia. ... An erect rhizome, which is a solid mass that gives rise to a tuft of fronds. You can see this type of rhizome on a king fern or a crown fern.
Explanation:
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After siting in the bathtub for hours your fingers start to look like prunes due to the process of
Answer:Shrinking Blood vassels
Explanation:
Spindle fibers begin to form.
Answer: Yes that is true but you gave basically NO information at all.
Explanation:
Answer:
yes that that that that Tish that that
which mutated protein causes the symptoms of sickle cell disease?
Answer:
Mutations in the HBB (beta-globin) protein causes symptoms of sickle cell disease.
Which feature is characteristic of rivers?
Answer:
A. a weak or strong current
Explanation:
hope this helps
Answer:a weak or a strong current
Explanation:
if retinal detachment occurs in the macula or fovea, one can predict that there would be a significant loss of ______.
Answer:
color vision
Explanation:
(SCIENCE) which of these statements about heating up water on earths surface is true? water heats up faster than land water heats up by conduction from Earth
PLEASE HELP!!!!
Answer:
Water heats up to a lower temperature than land.
Explanation:
Because water has a much higher heat capacity, or specific heat, than do sands, soils or other materials, for a given amount of solar irradiation , water temperature will increase less than land temperature.
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Find the remainder when p(x) = –2x5 + x4 + 5x3 + 4x + 1 is divided by (x - 2).
The remainder when p(x) = -2x⁵+x⁴+5x³+4x+1 is divided by (x-2) is 1.
To solve the question above, we make use of the remainder theorem.
Remainder Theorem: It states that if a function F(x) is divided by (x-a), the remainder is F(a).
From the question,
Given:
Dividend ⇒ p(x) = -2x⁵+x⁴+5x³+4x+1Divisor ⇒ (x-2)in view of the above and applying the Remainder theorem, The remainder will be p(2)
p(2) = -2(2⁵)+2⁴+5(2³)+4(2)+1p(2) = -64+16+40+8+1p(2) = 1hence the remainder when p(x) = -2x⁵+x⁴+5x³+4x+1 is divided by (x-2) is 1
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What processes are responsible for the formation of copper ?
Answer:
The high temperatures of volcanic magma creates hydrothermal veins, allowing some of the heat to escape near the upper layers of the Earth's crust. This is why copper is often found in the sedimentary layer, where sand and mud are compressed until they form a layer of sedimentary rock on the surface of the earth
Explanation:
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Identify two specific populations that most likely increased in number after the mountain lion population decreased. Explain why.
Any change that occurs at any link of a trophic web will affect the other links. The two specific populations that most likely increased in number after the mountain lion population decreased are rabbits and deers.
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The trophic web is a relationship process between different organisms, through which occurs transference of energy. The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
The first link corresponds to a producer organism -autotroph-.The following links are the consumers -heterotrophs-: herbivores and carnivores. The last links are the decomposers that degrade organic matter from dead organisms.
As it is a web, all organisms are equilibrated until a change occurs.
When the change affects any of the involved links, there can be a cascade effect on the web.
A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
Also, when two or more species are competing for the same source of food, a change in any of the population sizes will affect the other ones.
According to the provided trophic web, puma feeds on deer and rabbit.
Since puma was killed, their population size sharply decreased.
This fact followed the predator-prey cycle, in which the predator regulates the prey population size and vice-versa. When there is a decrease in the predator population size, the prey population increases in size because of the absence of their natural predators.
In the absence of puma, deer and rabbits increase their population size. They live in an environment with no predators and enough resources.
The number of individuals of each species increased, and the amount of food consumed increased too.
This change negatively affected grasses and grains, which were over-consumed. Also, crickets and mice were affected too because they compete for the same food source.
So, cascade effects would be as follows,
1) The decreased in the puma population size caused an increase in the deer and rabbit population size.
2) The increase in the deer and rabbit population size caused a decrease in the grains and grasses species population, because they were over consumed.
3) The decrease in grains and grasses caused a decrease in the cricket and mouse population, because they feed on the first ones, competing with deer and rabbits for food.
The two specific populations that most likely increased in number after the mountain lion population decreased are rabbits and deers.
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Briefly summarize the structure of moss.
Mosses are bryophytes, primitive plants believed to be among the first to develop the ability to live on land. Moss plants have no vascular tubes to transfer water or nutrients, and no true stems or roots. Environmental water sources and absorption limit moss plant size.
There may be as many as 15,000 species of mosses. Although unique species of moss grow in dramatically different habitats across the planet – from the arctic to the desert – all have basically the same structure.
Basic Moss SporesThe initial moss plant is a spore given off by the sporophyte that forms at the end of the moss plant’s “stem.” Released spores travel long distances on the wind and may remain viable for decades. Moss spores landing in suitable conditions divide and produce hairy filaments called protonemas, which are like thin plant threads that weave across the growing medium. Sprouting from the spore filaments, gametophytes form, held to the surface by rhizoids.
Main Structure of MossThe main moss structure is the gametophyte, which functions like a moss’s “stem” and “leaves.” A moss "stem" is called the axis, and this part of the moss supports leaf-like structures.
Phyllids are the leaf-like structures that carry out photosynthesis, transforming sunlight into sugars the moss uses for food. Typically arranged in a spiral, moss “leaves” are usually one cell thick with ribs two or more cells thick down their centers. The cells of moss plants contain chlorophyll, the green pigment that is essential for the process of photosynthesis.
Does moss have roots? No, not really. Moss stems end in root-like strands called rhizoids, specialized to hold the moss to its growing surface. Rhizoids anchor moss plants to the surfaces they grow on, but they do not absorb water and nutrients like true plant roots.
Second-Generation GrowthThe second moss structure is really a second generation. Moss reproduction occurs sexually, using separate plants produced at different times. The two separate kinds of moss plants are called gametophytes (which produce gametes) and sporophytes (which produce spores).
Gametophytes are tipped with either inverted cone-shaped areas (archegonia) or male reproductive organs (antheridia). Released sperm (antherizoids) need water since they swim to the archegonium. This is one of the main differences between bryophytes and vascular land plants – mosses need water for their sexual reproduction process.
Fertilization occurs once an antherizoid swims to an archegonium. Sprouting from the gametophyte tip after fertilization, a sporophyte holds itself in place by anchoring a foot in the archegonium.
Spore-Bearing PartsThe sporophyte stalk, called the seta, bears the sporangium (spore capsule) on its tip. One sporangium may produce up to one million spores. Maturing spore capsules are guarded by a covering called the calyptra that shrivels and falls off when the spores are mature. The calyptra can be a distinguishing part of a moss species, and they are often useful in identifying new mosses.
A cap called the operculum tops the capsule's opening under the calyptra. The capsule opening (peristome) can have teeth that help hold it closed. Matured spores are released when the capsule top ruptures and drift off to form new plants. Like the calyptra, the operculum and peristome of some moss species are highly identifiable.
What are some similarities and differences between an angiosperm and a gymnosperm? PLEASE
Answer:
Here are some similarities and differences
Explanation:
Both are more highly evolved than nonvascular plants, both are vascular plants with vascular tissue that live on land and reproduce by making seeds, both are classified as eukaryotes
Only angiosperms are known as flowering plants, many have blossoms and fruits that contain seeds and the typically drop their leaves when the seasons change their leaves are flat and are seasonal in their life cycle
Gymnosperms produce uncovered seeds, most have green needle-like leaf structures, they are generally evergreen
Are gender traits completely a result of societal expectations?
No, Gender traits are not as a result of societal expectations. They are as a
result of biophysical processes in the body.
Both genders have their unique chromosomes composition in which
Males have XY.Females have XX.During reproduction, the male sex cell passes either the X or Y chromosome
to the offspring while the female pass only the X chromosomes.
This depicts that the male sex cells which is the sperm is the main
determinant in the gender of a child.
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what is pathogen????
Pathogen is kinda disease, virus, bacteria or other microorganisms ( which can cause disease)
Answer: A pathogen is usually defined as a microorganism that causes, or can cause, disease :)
Explanation:
There are different types of pathogens, but we're going to focus on the four most common types: viruses, bacteria, fungi, and parasites.
Black eyes (B) are dominant to red eyes (b) in mice. Use a Punnett square to cross two heterozygous parents. What are the possible genotypes?
A. bb
B. BB and Bb
C. BB, Bb, and bb
D. Bb and bb
what is the first part of the small intestine called?
Answer:
The first part of the small intestine is called duodenum
Explanation:
The small intestine is a tightly folded tube which connects to the stomach on the top end and to the large intestine on the bottom end.
The small intestine consists of three parts:
duodenumjejunum (absorbs sugars, amino acids, and fatty acids)ileum (absorbs remaining nutrients that did not get absorbed by the duodenum or jejunum)Duodenum is responsible for completing the first phase of digestion. In this section of the intestine, food is mixed with enzymes and bile which help break down food.
Answer:
Duodenum
Explanation:
Duodenum is the first part where most of the small intestine digestion happens