4. Which of the following is NOT a way that viruses are classifieda. Shapeb. Sizec. Kingdomd. Host

1 answer:

8 0

The correct answer is c. Kingdom. Viruses are classified according to their morphological characteristics, nucleic acid composition and their host.

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A student decided to investigate the relation of height to resting heart rate. The student determined the resting heart rate of

frez [133]

Air temperature: When temperatures (and the humidity) soar, the heart pumps a little more blood, so your pulse rate may increase, but usually no more than five to 10 beats a minute.Body position: Resting, sitting or standing, your pulse is usually the same. Sometimes as you stand for the first 15 to 20 seconds, your pulse may go up a little bit, but after a couple of minutes it should settle down. Emotions: If you’re stressed, anxious or “extraordinarily happy or sad” your emotions can raise your pulse. Body size: Body size usually doesn’t change pulse. If you’re very obese, you might see a higher resting pulse than normal, but usually not more than 100. Medication use: Meds that block your adrenaline (beta blockers) tend to slow your pulse, while too much thyroid medication or too high of a dosage will raise it.

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2 years ago

Breathing involves the movement of diaphragm and Rib cage true or false

Elza [17]

Answer:

Explanation:

It's a true statement as,

When we inhale the diaphragm moves downwards and the rib cage moves upwards and outwards to let enter the outside air containing oxygen come in.
While we exhale the diaphragm comes to its position and the rib cage move downwards and inwards to let out the inside carbon-dioxide and other games out.

Hence, we can conclude that breathing involves the movement of diaphragm and Rib cage.

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2 years ago

Epigenetics may be defined as changes in the expression of a gene or set of genes by _______ and _______.

nataly862011 [7]

Epigenetics is the study of how DNA methylation and alterations to chromosomal proteins affect a gene or group of genes express themselves. For changes in a gene's expression, both of these are need.

In a biological process called DNA methylation, methyl groups are added to the DNA molecule. A DNA segment's activity can be altered by methylation without the sequence changing. DNA methylation usually inhibits transcription of genes when it occurs in a gene promoter.

Epigenetics literally translates to "along with changes in genetic sequence." Any procedure that modifies gene activity without altering DNA sequence and results in modifications that can be passed on to daughter cells is now included in the term. Is called Epigenetics.

Learn more about Epigenetics here

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8 months ago

The diagnostic term beri/beri refers to ________________ and is caused by the lack of thiamine (part of b complex: b-1) in the d

Alex73 [517]

The diagnostic term for beri/beri refers to body weakness "weakness/weakness" and is caused by the lack of thiamine (part of B complex: B-1) in the diet. Beri/beri typically attacks/damages the nerves and can further lead to loss of strength of muscles or worse case - paralysis.

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3 years ago

A scientist studied a population of birds for 10 years. During that time, the population was never fewer than 30 birds and never

ahrayia [7]

Answer:

A particular population limiting factor or factors must have been removed

Explanation:

The population of the birds must have been kept between 30 and 50 individuals by population limiting factors such as the presence of predators within the community or competition for resources such as food or spaces.

For the population to shoot up to 90 all of a sudden, it may be that one or more of the population limiting factors has been removed from the population. It could be that a major predator has been removed from the community or the competition for food/space is now significantly reduced due to more food/space in the community.

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2 years ago