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liraira [26]
3 years ago
11

A group of students is trying.to determine which detergent will best remove an oil stain. They stain five separate cloths with o

il and.then wash each of.the cloths in a deficient detergent. They repeat each test two more times. Which step should be included in their investigation plan?
Biology
2 answers:
Bingel [31]3 years ago
7 0

Answer: Place each oil stain on separate, but identical, pieces of cloth.

ELEN [110]3 years ago
4 0

Answer:place each

Explanation:

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During upwelling, nutrient-rich water rises to the surface. How would this most likely affect the biotic components of the ecosy
romanna [79]

Answer:

Explanation:

The upwelling of nutrients rich water to the top will increase species numbers and diversity.

When a particular area has the ability to sustain live by providing food and nutrients required for growth of organism the population will greatly increase this is because nutrients is the major source of competition among species for survival and every species goes in search for it and where there is abundance of it there will be a rise in population and diversity.

Varying type of species that are diverse in nature comes together, mating occurs more diverse species are formed.

8 0
3 years ago
All glands in the body, such as salivary glands and the pancreas, are derived from which type of tissue
tiny-mole [99]

Answer:

Endoderm

Explanation:

The embryo has three germ layers. The ectoderm, mesoderm, and endoderm. The endoderm is the innermost layer. Other than the endocrine glands, the other tissues that develop from the endoderm are the gastrointestinal tract, urinary and auditory system, and the respiratory tract.

4 0
3 years ago
Name the landscape region that contains the youngest rock material.
natulia [17]
The answer should be Atlantic Coastal Plain
3 0
3 years ago
What is an acid?<br> What is the ph level of an acid?
Stels [109]

Answer:

• An acid is an electrolyte that hydrolyses in water to release hydrogen ions.

{ \rm{HA _{(aq)} \:  \:  {}^{ \dashrightarrow} _{ \dashleftarrow} \:  \:  H {}^{ + } _{(aq)} +A {}^{ - }  _{(aq)}}} \\

• pH level of an acid;

  1. Strong acid → 0 - 3.8
  2. Weak Acid → 4.0 - 6.7
7 0
2 years ago
The HR diagram represents stages in the life cycle of a star.
Veseljchak [2.6K]

white dwarf

Explanation:

A appears on the chart at the point of low luminosity but high surface temperatures. This indicated  a White Dwarf

A red giant is highly luminous stars mainly because of its large size. However, its surface temperature is hot a high when compared to white dwarfs. White dwarf surface temperatures can reach billions of degrees kelvin while red giants reach up to 5000 K on their surface.

A white dwarf is the last sequence of a low-mass star cycle and follows the red giant phase.

4 0
3 years ago
Read 2 more answers
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