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snow_tiger [21]
3 years ago
10

Why are pollen grains useful when studying the climate history of a region?

Biology
2 answers:
Alexeev081 [22]3 years ago
4 0
They can be preserved within the fossils of organisms that carry them. They provide clues about the types of plants that grew in a region at a particular time.
iren2701 [21]3 years ago
4 0

Answer: D on edge

Explanation:

They provide clues about the types of plants that grew in a region at a particular time.

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HELP PLEASE If carrots were removed from the food web, how might the other populations be affected?
egoroff_w [7]
There might be fewer rabbits and foxes
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3 years ago
Replication is called semiconservative because half of the strand is
photoshop1234 [79]

Answer: Replication is called semiconservative because each of the original strand is is used as a template for the synthesis of a new strand

Explanation: DNA is a double-stranded helix containing two antiparallel strands that are complementary to each other.

Replication is the process of making identical copies of a DNA molecule. Before replication begins, the double-stranded DNA is first unwound by helicase so that each strand will serve as a template for new strand synthesis.

DNA replication is semiconservative because each DNA strand serves as a template for the synthesis of a new strand, producing two new DNA molecules each one with one new strand and one strand.

Saved and used in the new strand

8 0
3 years ago
Fitness is:
8_murik_8 [283]

Answer:

d. None of the above

Explanation:

Fitness -

Fitness is to carry out day to day tasks with alertness and vigor , without any of fatigue , along with the energy , to respond to emergencies and to enjoy leisure-time pursuits.

Advantages of Fitness -

  • avoid diseases by fitness .
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3 0
2 years ago
Question 5 what organisms have an open circulatory system? fish frogs mammals insects birds
katrin [286]
Crustaceans, insects, spiders, lobsters, clams, etc.
5 0
2 years ago
Lesson 01.04 Properties of Water
ryzh [129]

Answer:

1= In living organisms cells are composed of water or we can say that water is one of the important constituent of cells.

2= Hydrogen bonding import man properties to the water such as cohesion, high heat of vaporization, high heat capacity etc.

3= Because of high polarity, all polar substance get dissolve and make it universal solvent.

Explanation:

Solvent is the that part of solution which is present in large proportion and have ability to dissolve the solute. In simplest form it is something in which other substance get dissolve. The most widely used solvent is water, other examples are toluene, acetone, ethanol, chloroform etc.

Water is called universal solvent because of high polarity all polar substance are dissolve in it. Hydrogen is less electronegative while oxygen is more electronegative and because of difference in electronegativity hydrogen carry the partial positive charge while oxygen carry partial negative charge.

Hydrogen bond:

The hydrogen bond is the attraction between the toms which already take part in the other chemical bons. The one atom is hydrogen while other may be oxygen, nitrogen or fluorine.

The hydrogen bonding in water import man y properties in it such cohesion, high heat of vaporization, high heat capacity etc. The hydrogen bond hold the water molecules together.

Water create electrostatic interaction with other polar molecules. The negative end of water attract the positive end of polar molecules and positive end of water attract negative end of polar substance and in this way polar substance get dissolve in it.

Example:

when we stir the sodium chloride into water the cation Na⁺ ions are surrounded by the negative end of water i.e oxygen and anion Cl⁻ is surrounded by the positive end of water i.e hydrogen and in this way all salt is get dissolved.

7 0
3 years ago
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