The force that can put unhealthy tension on the heart as it is pumping is called blood pressure. true or false

Biology

2 answers:

Studentka2010 [4]3 years ago

7 0

True, high blood pressure, or hypertension, can put strain on the heart, causing various health problems.

kykrilka [37]3 years ago

7 0

The correct answer is:

true

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One of the grand challenges in biology is understanding how the first cells formed on Earth. Since all cells are bound by a cell

coldgirl [10]

<h2>Answer is option "A"</h2>

Explanation:

Oils and fats, which in science are called lipids, are known as amphipathic molecules. These molecules have two distinct ends to them: a water-loving (hydrophilic) side and a water-fearing (hydrophobic) side. While the hydrophilic sides of a lipid will associate with the water in a solution, the hydrophobic sides of the lipid all cluster together to 'hide' from the water. Lipids therefore cluster together and form spheres where the hydrophobic sides are in the center away from the water while the hydrophilic sides are on the outside, associating with the water.
The ability of the atoms within a group to form hydrogen bonds with the water molecules around them makes them hydrophilic. Oxygen and nitrogen atoms readily form hydrogen bonds with water molecules, so any organic molecules that have oxygen or nitrogen atoms bound to their carbon skeletons will be hydrophilic.
For example, if we take the molecule for cholesterol, we see the OH group on the left is hydrophilic and will form hydrogen bonds with water, while the ring structures, which only consist of hydrogen and carbon atoms, are hydrophobic and will not associate with the water.
There are many different kinds of lipids with different functions. Lets start by examining phospholipids, which compose the cell membranes of animals. They form lipid bilayers, with one set of hydrophilic heads facing the exterior of the cell membrane and the other set facing the interior (as you can see on the diagram on screen). The hydrophobic portions of the lipid bilayer - the lipid tails - face towards one another, which allows them to hide away from the water inside and outside of the cell.
So,the right answer is option A "amphipathic molecules".

5 0

3 years ago

What is the point at which DNA strand is unzipped so that it can form new complimentary strands?

Sloan [31]

DNA is unzipped by helicase at the origin of replication. There are several origins of replications in eukaryotic DNA replication, while only one in prokaryotic replication.

4 0

3 years ago

A cross section of a flower is shown below:

Marina86 [1]

The anther and filament, the anther produces pollen. They are the parts of the male reproductive organ in a flower.

<h3>What are the male parts of the flowers?</h3>

The flower can be considered as the reproductive structure of flowering plants.

The anther and filaments represent the male structures of a flower, which may also contain female structures.

The stamen can be considered as the male reproductive organ because this structure is responsible for producing pollen which contains germinal cells in a flower.

Learn more about flower parts here:

brainly.com/question/3197281

5 0

2 years ago

The ____

Alex

Trait

I'm sorry I don't know how to explain it.

6 0

3 years ago

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of t

TEA [102]

Answer:

C) Clone the plant

Explanation:

Cloning is the process by which genetically identical offsprings are obtained naturally or artificially. In nature, genetically similar individuals or offsprings are obtained from asexual reproduction.

If a horticulturist succeeds in having a single plant with the desired trait than to establish a line of such plant she should clone the plant so that the plants which are obtained after cloning have the same traits which were present in the parent plant. Therefore the correct answer is C.

3 0

3 years ago