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Answer:

Vitamin A

Explanation:

Vitamin helps corrects deficiency and  improve night blindness.

Dilution is necessary during pure culture preparation to reduce the bacterial load and allow readable colonies to grow.

Dilution of bacteria culture is carried out in comparison to McCfarlan standard so as to have a decent number of bacteria that will not be too numerous or too little to observe the growth of distinct colonies during culture preparation.

Without dilution, colonies may form but may be too numerous to count. Too much dilution may also lead to no growth in the culture plates.

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Algae blooms are caused by an oversupply of nutrients like to water bodies, causing eutrophication. In the exposed example, a reason for the high levels of phosphorus is option B. Cow pastures.

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Eutrophication is a biological process produced in water by an oversupply of nutrients or organic matter.

The source of these high nutrient levels, especially nitrogen and phosphorus, are anthropogenic activities.

This oversupply favors phytoplankton multiplication, especially cyanobacteria.

Cyanobacteria can grow in seawater, but blooms mainly occur in freshwater where the salinity level is low.

These algae species that affect freshwater bodies are microscopic, photosynthetic organisms.

Blooms of cyanobacteria reflect the sanity state of water and its abiotic characteristics. They cause severe disasters in water biota and affect human health.

This overgrowth leads to an enhance in primary productivity and reduces the pass of radiation to deeper strata. This fact affects biota in deeper zones.

Gradually sedimentation begins, caused by the death of some vegetable organisms that sink in the bottom.

These sediments suffer decomposition in the presence of oxygen.

When oxygen disappears, anaerobic bacteria act and produce fermentation.

Phytoplankton overgrowth on the surface and fermentation process in the bottom, originate toxic compounds that can damage the animals in the water body and humans that get in touch with this water.

Animals die, creating more sediments in the bottom where there are anaerobic conditions.

The lack of oxygen and light continued to increase in decomposition, and fermentation produces a bad smell and toxicity.

Concerning the sources of nutrients that might be causing these events, we can mention, among others, cow pasture.

Cow pasture increases the levels of phosphorous on the ground, which ends in water streams, and from there to ponds or lakes.

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Answer: cow pasture

Explanation:

Answer:

yes

Explanation:

Answer:

The Black Death brought about a decline in feudalism. The significant drop in population because of massive numbers of deaths caused a labor shortage that helped end serfdom. Towns and cities grew. The decline of the guild system and an expansion in manufacturing changed Europe's economy and society.

Explanation:

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Ovulation starts when the secretion of Luteinizing hormone (LH) peaks in females.

Ovulation is simply the release of eggs from the ovaries of females. It happens as a part of the menstrual cycles of the female gender.

The release of eggs from the ovary is triggered by an acute rise in the level of LH in females. LH in males stimulates the production of testosterone.

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Answer:

Polyploidy

Explanation:

Answer:c

Explanation:more oxygen

Answer:

yes

Explanation:

i took it

A slide can be influenced by friction, weight, and the angle of the slope. The materials that form flow generate less friction depending on the environmental conditions.

A slide is a movement that occurs when a fragment of soil/rock suddenly moves down a slope.

Slope stability is a factor influenced by the angle of the slope and the strength of the materials (e.g., rocks) on it.

The slide movement can ultimately be considered as a battle between friction versus gravity.

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Answer:

I believe that they are both C

Answer:

English scientist Robert Hooke published Micrographia in 1665. In it, he illustrated the smallest complete parts of an organism, which he called cells. theory that all organisms are made of cells, which are the basic structural units of life

Answer:

The lesson provided all the information, and I got a 100%

Explanation:

Answer:

the boll weevil has an amazing complex gene system that allows them to quickly overcome many poisons. if so much as a few survive those few will have offspring and adapt being completely immune to the once deadly poison.

These can be done by washing of the vegetables, good kitchen Hygiene and proper storage.

Vegetables are perishables, with some quantity of stored water  and therefore they harbor bacteria.

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Answer:

All plants

Explanation:

This is due to the presence of chorophlly . the green colouring pigment in plants

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Answer: A scientific theory is the correct answer

Answer:

A chromatid is one of two identical halves of a replicated chromosome. During cell division, the chromosomes first replicate so that each daughter cell receives a complete set of chromosomes.

Explanation:

Answer:

Hope fully this sheet will be able to help you

Explanation:

Answer:

Plate tectonics

Explanation:

The mid atlantic ridge is an underwater mountain system formed by tectonic plates. It is the result of a divergent plate boundary.

Answer:

A. AIga

Explanation:

Alga can live in freshwater lakes or in salt water oceans. Most green alga occur in fresh water, usually attached to rocks and wood.

The ferns are most commonly plants of shaded damp forests of both temperate and tropical zones. Some fern species grow equally well on soil and upon rocks others are confined strictly to rocky habitats.

Mosses are distributed throughout the world except in salt water and are commonly found in moist shady locations. They are best known for those species that carpet woodland and forest floors. Hence, mosses break down exposed substrata, releasing nutrients for the use of more complex plants that succeed them.

Roses typically grow in warm climates and flower in the summer months. However, some roses can grow in the hot tropical climate found in Florida, while others can grow in hardiness zones as low as 2, which have winter temperatures that drop as low as -50 degrees Fahrenheit.

Hence, A. Alga is the correct Answer.

Answer:

Line 3, I think

Answer:

the fourth one

Explanation:

Answer: Hi good evening..

No thanks

I will help whenever you need

Explanation:

Injecting hormones into young livestock can make them gain weight faster. More weight means more meat, which means more profit for the producer. Hormones also increase the production of milk by dairy cows. Hormones have been used for decades in the meat and dairy industries.

Answer:

A chronic condition is a human health condition or disease that is persistent or otherwise long-lasting in its effects or a disease that comes with time. The term chronic is often applied when the course of the disease lasts for more than three months.

Explanation:

Hope you could get an idea from here.

Doubt clarification - use comment section.

Hope you could get an idea from here.

Doubt clarification - use comment section.

Answer:

All living things are composed of cells.

Cells are the basic units of structure and function for living things.

All cells come from pre-existing cells. Also, organisms grow by “adding on more cells” NOT by increasing the size of their cells.

Answer:

I think it would be the brain since we are told everyday is a learning day so the more we learn the more it grow