BIOLOGY COLLEGE

Atoms share electrons in which of the following?ionic bonds
hydrogen bonds
covalent bonds
van der Waals forces

Answers

Answer 1
Answer: Covalent bonds electrons are shared

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Pleas help ASAPWhich of these materials is a good conductor of electricity?
A. glass
b.metal
c.rubber
d.newspaper

Answers

The answer is b. Metal

Write an essay on ecosystem productivity​

Answers

A ecosystem productivity is a rate of generation of biomass.’’I know this because it states.”In economy productivity refers to the rate of generation of biomass in an economy.This shows that the economy its usually expressed in units of mass per unit.

Structure moves up against epiglottis when food is swallowed to prevent passage of food into it.a. The larynx
b. The nose
c. The pharynx

Answers

Answer:

The correct answer is A. The larynx moves up against epiglottis when food is swallowed to prevent passage of food into it.

Explanation:

The epiglottis is a moist, cartilaginous structure that is part of the cartilaginous skeleton of the larynx. It also marks the boundary between the oropharynx and the laryngopharynx. The epiglottis obstructs the passage of the bolus at the time of swallowing preventing it from going to the respiratory system.

Larynx closure occurs when the vestibular and vocal folds approach the midline during swallowing. Occasionally, when you eat very fast, solid foods or liquids can enter the larynx.

Changing the pendulum design after the first trial was an example of _____________ to solve the problem presented by the teacher. A) designing the model B) evaluating the model C) identifying the problem D) doing research on the problem

Answers

Answer:

evaluating the desing

Explanation:
I believe is c for me is what makes more sense

In peas, the round allele (r) is dominant to the wrinkled allele (r), and tall (t) is dominant to short (t). a pure-breeding round, tall strain is crossed to a wrinkled, short strain, and the f1 plants are crossed back to the wrinkled, short strain. what proportion of the offspring will be wrinkled and tall

Answers

The round allele is dominant (R)
The wrinkled allele is recessive (r)
The tall allele is dominant (T)
The short allele is recessive (t)

The genotype of the f1 generation would be RrTt.So if you cross that back to the wrinkled short then the Punnet of that cross would look like this:

RrTt x rrtt

      RT           Rt           rT          rt
rt   RrTt       Rrtt          rrTt        rrtt
rt   RrTt       Rrtt          rrTt        rrtt
rt   RrTt       Rrtt          rrTt        rrtt
rt   RrTt       Rrtt          rrTt        rrtt

The genotype for a wrinkled tall should be rrTt at least in this case because neither of the parents are pure-breed. 

The proportion would then be then 4/16 or 1/4. There is a 25% chance of  yielding a wrinkled tall. 

Final answer:

When crossing a heterozygous round, tall F1 pea plant with a homozygous wrinkled, short pea plant, the probability of the offspring being wrinkled and tall is 1/4.

Explanation:

In pea plants, we have two traits where round seed shape (R) is dominant to wrinkled seed shape (r), and tall height (T) is dominant to short height (t). When a homozygous round, tall plant (RRTT) is crossed with a homozygous wrinkled, short plant (rrtt), the resulting F1 generation will all have the genotype RrTt (heterozygous for both traits). If these F1 plants are then crossed back to the wrinkled, short strain (rrtt), we need to look at each trait separately to determine the phenotype ratios.

For the seed shape, the F1 plants (Rr) crossed with the wrinkled, short (rr) can produce offspring with either Rr or rr genotype. Therefore, the probability of having a wrinkled (rr) offspring is 1/2. For height, the F1 plants (Tt) crossed with the wrinkled, short (tt) can also produce offspring with either Tt or tt genotype. The probability of having a tall (Tt) offspring is 1/2 as well. To find the proportion of offspring that are wrinkled and tall, we multiply the probabilities of the independent events: 1/2 (chance of being wrinkled) × 1/2 (chance of being tall) which equals 1/4.

Therefore, the proportion of offspring that will be wrinkled and tall from this cross is 1/4.

Which of the following animals uses its grinding teeth to chew foodoptions are
wolf, cat, elephant, lizard ​

Answers

Answer:

the answer is the elephant
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