BIOLOGY HIGH SCHOOL

What element has 81 protons in the nuclei of its atoms?

Answers

Answer 1
Answer: Tl = thallium

look at the periodic table look for element number 81 on the periodic table and that's TI

It's mass number is 204.38

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The rats that came to Easter island are described as unintended stowaways who climbed aboard the ships. Because they are not originally from the island, they are considered a _____ series.

Answers

Answer:INVASIVE

Explanation:

Final answer:

Rats, introduced to Easter Island, are considered an invasive species because they are not native and have the potential to cause damage to the environment or other species.

Explanation:

The rats that came to Easter Island and then began to live and reproduce there would be classified as an

invasive species

. An invasive species is a type of organism that is not native to a particular region and has the potential to cause harm to the environment, human economy, or human health. By rapidly reproducing and spreading, they can disrupt the balance around them and outcompete native species for resources. Changes brought about by invasive species can sometimes be irreversible.

Learn more about Invasive Species here:

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What is a reducing sugar?

Answers

Reducing sugar is any sugar (all monosaccharides, some disaccharides, oligosaccharides, and polysaccharides) that is capable of acting as a reducing agent because it contains free aldehyde group or free ketone group.

Aldehyde group or alkanal is an organic compound containing formyl group. The formyl group is a functional group consisting of a carbonyl center bonded to hydrogen and an R group. This group can be readily reduced to primary alcohol with the help of catalyctic hydrogenation either applied directly or by transfer hydrogenation.

Ketone group unlike aldehyde group does not have a hydrogen atome bonded to the carbonyl group but it can still be hydrogenated.

A gland secretes enzymes through a duct onto the surface of a body part. Which gland is it most likely to be?. . A.pituitary gland. . B.salivary gland. . C.thyroid gland

Answers

I believe the correct answer among the choices listed above is option B. A gland secretes enzymes through a duct onto the surface of a body part is a salivary gland. It is under the classification of exocrine glands. Hope this answers the question.

Answer: Salivary Gland

Explanation:

The salivary gland in human being is exocrine gland which helps in the production of saliva through a system of ducts.

Human beings have three paired major ducts in salivary glands that secrete their secretions in the mouth by the help of duct.

The main type of enzyme secreted is alpha-amylase which helps in the breakdown of starch into glucose and maltose.

Which of the following describes a negative Feedback loop? A) When the heart rate is too high the body since hormones that continually increase the heart rate higher B)When a pregnant woman is a labor in the body since hormones that increase the intensity of contractions which then increases the secretion of the same hormones C)When blood sugar is too low the body since hormones that raise blood sugar until it reaches a typical level and hormone secretion slows D)When a person is jogging the body since four months to continually do you kris the rate of oxygen supply to the legs

Answers

Answer:

its c : When blood sugar concentration is above normal, the endocrine system releases hormones that lower the blood sugar concentration until it reaches a normal level, and the release of the hormones slows.

Explanation:

A) Positive feedback loop

B) Positive feedback loop

C) Negative feeback loop

Over a lifetime, a diet high in cholesterol can cause blood vessels to become less elastic. WHICH CAN LEAD TO HIGH BLOOD PRESSURE? WHAT DISEASE DESCRIBES THIS CONDITION? A. obesity
B. Heat stroke
C. Atherosclerosis
D.sickle cell anemia

Answers

A. obesity, is best. Option.
I think it is B.heat stroke

As an arthropod gets bigger and grows, its exoskeleton gets bigger and grows as well. True False

Answers

that is true the exoskeleton grows as well.
that answer is true for the statement provided
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