In summers, the leaves of a potted plant droops when the soil becomes dry. Which cell organelle makes the leaves to droop?

Which statements describe the cell membrane? Check all that apply. The cell membrane is very selective. The cell membrane lets a

Sever21 [200]

Answer:

The three statements or tenets of the cell theory are: All living beings are made up of cells. Cell is the most basic unit of life. All cells must come from pre-existing cells.

Explanation:

3 0

2 years ago

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has recently taken up weight lifting and his friends at the gym mistakenly believe they should eat more protein to build muscle.

faltersainse [42]

Complete Question

Ruben Ward has been weight lifting and eating a high protein diet. Below is Ruben's profile and what he ate for a day. He entered his profile information and food intake into Diet & Wellness Plus and then pulled the Diet & Wellness Plus Reports. View Ruben’s Intake vs Goals and Macronutrient Ranges Reports and then answer the questions below. Profile for Ruben Ward 1. Age: 19 years old 2. Gender: Male 3. Height: 5 ft, 8 inches 4. Weight: 205 lbs 5. Non-Smoker 6. Activity Level: Active

Ruben has recently taken up weight lifting, and his friends at the gym mistakenly believe they should eat more protein to build muscle. The DRI for protein for healthy adults is 0.8 g per kg body weight. If Ruben weighs 205 lbs (93 kg), how many grams protein per kg body weight did he eat on this day?

a. 5.37 g/kg

b. 10.33 g/kg

c. 3.55 g/kg

d. 4.88 g/kg

Answer:

c. 3.55g/kg

Explanation:

RDI means Recommended Dietary intake. It is the required amount of a nutrient expected to be taken by an individual for optimal health.

The Recommended Dietary Intake I'd protein falls withing the range of 0.8 grams per kg to 1.8 grams per kg

For Reuben

He weighs 93 kg

If Reuben consumed 330 grams of protein, his grams of protein per kg body weight is

330 grams ÷ 93kg

= 3.55g/kg.

4 0

2 years ago

A geneticist crossed pure breeding black mice with pure breeding brown mice. All the 992 mice in F1 generation had black coats.

MaRussiya [10]

Answer:

The statements that apply are the third and the fourth.

Explanation:

Since the mice crossed were pure breeding, each parent produced sperms of one kind, both alleles of each parente were equal. Thus, the first (A) and second (B) statements are false.

Assume pure breeding black mice produced BB sperm and pure breeding brown mice produced bb sperm.

The punnett square for the first generation, F₁ is would be:

b b

B Bb Bb

This is, all the F₁ generation mice are Bb.

All the 992 in F₁ generation had black coats means black is dominant.

Now when F₁ generation is crossed, the punnet square reveals the second generation, F₂:

B b

B BB Bb

b bB bb

The brown allele that was hidden now appears.

Based on the assumption that black is dominant, BB, Bb and bB are black, which is 3/4 or 75%. This, is 75% of the mice in the F₂ genrertion are black.

The combination bb is brown. Thus, 1/4 or 25% of the mice in the F₂ generation are brown.

When the mice in the first generation were crossed, they yielded 961 black coated mice and 317 brown coated mice. That is:

Total mice: 961 + 317 = 1278

Proportion of black mice: 961 / 1278 ≈ 0.75 = 3/4

Proportion of brown mice: 317 / 1278 ≈ 0.25 = 1/4

Ratio black to brown: 3 to 1.

Therefore, it is proven that an approximately three-to-one ratio of black to brown cated mice in F₂ is accounted fro the black allele being dominant over the brown allele (choice C.)

Also, the brown allele is not independent from the black allele and dissapears in the F₁ generation: it is not independent because it presence will only be shown when the black allele is not present, and it is said that it dissapears because it is not revealed, it is hidden.

8 0

1 year ago

Which organism is a primary consumer in the food web below? mc020-1.jpg herbivorous duck bald eagle osprey vegetation

musickatia [10]

Herbivorous are the primary consumers
The primary consumers are herbivores animals sch as cows,goats,and elephants. They consume plants. Plants are the producers. To be able to extract energy from plants,herbivores must eat a large chunk of plant materials which explains why herbivores has to eat consistently.

4 0

1 year ago

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Technological advances had helped reveal that the ocean floor was not flat, as once believed, but instead was marked by 50,000-k

poizon [28]

By the late 1960s, scientists had developed the theory of plate tectonics based on a range of new evidence. Technological advances had helped reveal that the ocean floor was not essentially flat, as once assumed, but instead was marked by 50,000-kilometer-long (31,000-mile), 3,000-meter-high (9,800-ft) ridges and 11-kilometer-deep (7-mile) trenches. Scientists found striking patterns related to these features. They found that the youngest oceanic crust is located nearest the mid-ocean ridge and the oldest crust is nearest the trenches. They also detected a pattern of alternating magnetic polarity along the ocean floor, which emanated from the ridge tops. These two pieces of evidence, coupled with the fact that volcanic activity and island-building occurred most commonly at ocean trenches, suggested that new crust was created at mid-ocean ridges and destroyed at ocean trenches. Scientists Harry Hess and Robert Dietz used this evidence to revive and expand Holmes' convection theory into the theory they called "seafloor spreading." Finally, Wegener's notion of continental drift was coupled with a mechanism that could explain the movement of tectonic plates.

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1 year ago

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