The continents began to drift apart by the end of the ______

All enzymes are examples of organic molecules known as?

Dafna11 [192]

Answer:

<h2>PROTEINS</h2>

Explanation:

Many important molecules in the hman body are proteins like enzymes, antibodies, e.t.c.

Enzymes are a type of protein that speed up chemical reactions.

8 0

2 years ago

Greg, who is 5 years old, is the tallest person in his kindergarten class. When his teacher asked him how he thought he got so t

yaroslaw [1]

Answer:

The exact answer would be "genetics and his diet"

Explanation:

Since his parents are tall he knows he will be too, and by him eating good foods that will help him develop faster.

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3 years ago

4. Which of the following characteristics of living things could be applied to an automatic door at a

Vika [28.1K]

Living things respond to stimuli in the environment.

8 0

3 years ago

List the five levels of organization in living things such as humans in order from simplest (1) to most complex (5):

Montano1993 [528]

Answer:

cells, tissues, organs, organ systems, organism

Explanation:

The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism

8 0

2 years ago

Read 2 more answers

18. Refer to Models 1 and 2 to complete the chart below. Write yes or no in the box for cach cell.

Ostrovityanka [42]

The most primitive cells are prokaryotic. They are simple, with no organelles and no nucleus. Animal and plant cells are eukaryotic, but they express some differences such as the cell wall, chloroplasts, or centrioles.

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BACTERIA CELLS

Bacteria are prokaryotic cells.

Prokaryotic cells lack a nucleus, nucleolus, and organelles.

They only present plasmids, ribosomes, and genetic material in their cytoplasm.

DNA not surrounded by membrane

They have a cell wall that protects the cell and a cell membrane that surrounds the cytoplasm. Some of them can also present a capsule.

Some of them have flagellum.

These organisms are capable of inhabiting places with extreme temperature, salinity, acidity, or pH, among others.

ANIMAL AND PLANT CELLS

Both the animal and plant cells are eukaryotic.

They carry their genetic material in the nucleus and mitochondria.

Organelles are located in the cytosol, and both of them are surrounded by a protector cell membrane.

However, they have some differences:

⇒Cell wall : A rigid structure that provides support and protection.

• Animal cells do not have a cell wall. They are only surrounded by the cell membrane, which is flexible so they can adopt different shapes.

• Plant cells have a wall, so their shape is usually prismatic and regular. The cell wall is composed mainly of cellulose.

⇒ Chloroplast: these are organelles that accumulate chlorophyll.

• Animal cells do not have chloroplasts because they do not photosynthesize.

• Plant cells have chloroplasts, and they are in charge of the photosynthesis process that allows plants to release oxygen. These organelles use solar light as the source of energy.

⇒ Vacuoles:

• Animal cells have many and small vacuoles whose function is to store water, ions, and waste intracellular substances.

• Plant cells have a unique big-sized vacuole that might occupy almost 90% of the cell. Their principal function is to store water and keep the turgidity. When the vacuole gets empty, the plant loses rigidity.

⇒ Other differences are:

The animal cell has centrioles, while the vegetable cell does not.

Plasmodium, chromoplasts, and glyoxysomes are present in the vegetable cell but not in the animal cell.

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3 0

2 years ago

The continents began to drift apart by the end of the _______ period.