All categories

2 years ago

1. Which of the following is an example of a direct observation?

Biology

1 answer:

AVprozaik [17]2 years ago

4 0

Answer: a. Measuring the amount of rain that falls in a 24-hour period in a rain gauge.

You might be interested in

Anestetic [448]

Answer:

table 1.

Explanation:

3 0

1 year ago

Karen and Steve each have a sibling with sickle-cell disease (recessive disorder). Neither Karen nor Steve nor any of their pare

Talja [164]

To first understand your question, here are some vocabulary terms I will be using throughout this problem.

Homozygous dominant: (BB) This is not having sickle cell disease.
Homozygous recessive: (bb) This is having sickle cell disease.
Heterozygous: (Bb) This is being a carrier for sickle cell disease.

We know that having sickle cell disease is a recessive disorder so it will be homozygous recessive (bb).

We also know that Karen and Steve each have a sibling with sickle cell disease, but they don't. This means that both of their parents have to be heterozygous (Bb), or a carrier for the disease.

If their parents are both heterozygous (Bb), there is a 1/4 chance that Karen and Steve are completely healthy (BB) and a 2/4 chance that they are carriers (Bb). We know for a fact that they aren't sick so that is out of the question.

This means that the probability of Karen and Steve being a carrier for this disease is 2/3.

Now, we can make a Punnett square for the probability of their children, which I have attached below. Since being heterozygous is most likely, I made both Karen and Steve heterozygous in the Punnett square.

This means that their children are 1/4 likely to be completely healthy (BB), 2/4 likely to be a carrier (Bb), and 1/4 likely to have sickle cell disease (bb).

Now we can multiply the probability of both of Karen and Steve being a carrier for sickle cell, which is 2/3 each, with the probability of their children having it, which is 1/4.

2/3 × 2/3 = 4/9

4/9 × 1/4 = 1/9

The final probability of Karen and Steve having a child with sickle cell disease is 1/9.

3 0

2 years ago

A child continues to use hand sanitizer every day. After a while, the child gets sick. What might

morpeh [17]

Answer:

The bacteria might have gotten immune to the hand sanitizer.

Explanation:

While the hand sanitizer kills the bacteria, the bacteria starts to learn how it works and how to react when it needs to go up against it. Think of it this way, the hand sanitizer goes to the bacteria and starts to slap it to kill it, but while it is doing that, the bacteria starts to learn how it works and all of its moves. It then uses it moves against it and becomes a SUPER BACTERIA!!!

I really hop this helped, BYE

8 0

2 years ago

Frequent exposure to the sun without wearing sunscreen puts you at risk of developing ____, the most common type of skin cancer.

iragen [17]

Frequent exposure to the sun withought wearing sunscreen puts you at risk of developing carcinoma , the most common type of skin cancer

8 0

2 years ago

What de-polymerizes microtubules to separate sister chromatids during anaphase?

Oxana [17]

Answer:

There are two main ideas about how chromosomes move in anaphase A. One is that motor proteins at the kinetochores use the energy of ATP hydrolysis to pull the chromosomes along the kinetochore microtubules, which depolymerize as a consequence.

Explanation:

6 0

2 years ago