BIOLOGY HIGH SCHOOL

Which of the following is a source of genetic variation in sexually reproducing organisms?a. replication
b. dominance
c. mitosis
d. meiosis

Answers

Answer 1
Answer: the answer is d.meiosis

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What is the name for the transfer of genetic information from one bacterium to another bacterium by a phage? select one:a. transduction
b. translation
c. penetration
d. excision?

Answers

the answer is option a

Grazing cows disturb the grass and cause insects to fly around the cows as they eat. In turn, birds swoop in and eat the insects. This type of feeding relationship is an example of

Answers

Answer:

Commensalism/Predation

Explanation:

Based on the scenarios, the feeding relationship in this case can be viewed from two points;

  • Between the cow and the birds
  • Between the birds and the insects

The feeding relationship in the first scenario can be considered as commensalism. It is a form of nutritional relationship between two organisms in which one of them, the commensal benefits, and the other is unaffected in any way.

The bird, being the commensal in this case benefits from the cow because without the cow disrupting and driving out the insects, there will not be any food for the birds to feed on. On the other hand, the cow neither benefit nor suffer from the actions of the birds.

The feeding relationship between the birds and the insects is predator/prey relationship. In predation, the predator kills and feeds on the prey. The predator is usually bigger in size than the prey. The predator is usually well adapted and equipped to hunt for its preferred prey in the environment.

In this case, birds are bigger than insects and are able to feed on the insects. This means they posses all the necessary features to pick, eat and digest the insects.

Hence, the answer could be commensalism/predation depending on the point of focus.
I think this relationship is Commensalism because one of them benefit(the bird) and one is not benefited or harmed(the cow).

If a chemical reaction is reversed, what happens to the enthalpy of the reaction?A. The enthalpy of the reaction becomes zero.

B. The enthalpy of the reaction doubles.

C. The sign of the enthalpy of the reaction reverses.

D. The enthalpy of the reaction is halved.

Answers

Answer:   C. The sign of the enthalpy of the reaction reverses.

Explanation: Enthalpy of a reaction is the net heat absorbed or released  during a chemical reaction.It is represented by \Delta H. It is negative for exothermic reactions in which heat is released and is positive for endothermic reactions in which heat is absorbed.

When a chemical reaction is reversed the heat of the reaction changes its sign.

CaCO_3\rightarrow CaO+CO_2   \Delta H=+ve

The decomposition of calcium carbonate is an endothermic reaction as heat is required to break the bonds and thus energy is absorbed.

CaO+CO_2\rightarrow CaCO_3    \Delta H=-ve

When the reaction is reversed, the reaction becomes exothermic as now bonds are getting formed and energy is released.
in a chemical reaction is reversed, the one that happens to the enthalpy of the reaction is : C. The sign of the enthalpy of the reaction reverses

It's one of Hess' Law : reversing an equation means reversing the sign of entalphy value

Hope this helps

The male voice tends to be in a lower range than a female's voice because men have:a. shorter and fatter vestibular ligaments
b. more air to push through the rima glottidis
c. more taut vestibular folds
d. longer and thicker vocal folds e) wider arytenoid cartilages

Answers

I belive it should be d but I could be wrong why I do think its d tho is beacuse there would be less tension on the folds hemces creating a lower voice

CAN SOMBODY PLEASE HELP ME WITH MY HW THANL YOU 60 PONITS!!!!!!!!!!!!!!!!!!!1. Reducing energy and pesticide use
2. Promoting an understanding of and appreciation for the environment
3. Eliminating invasive species
4. Reducing pollution in lakes, rivers, and bays
5. Promoting corporate responsibility

A.
Environmental education centers
B.
Native plant organizations
C.
Pro-conservation political groups
D.
Local organic co-ops
E.
Local water alliances

Answers

the answers are
1._ D. Local organic co-ops 
2._A. Environmental education centers 
3._B. Native plant organizations
4._E. Local water alliances
5._C. Pro-conservation political groups

Connie is a healthy 22-year-old student who weighs 155 pounds. what is her recommended dietary allowance (rda) for protein?

Answers

The answer is 56 grams per day.  RDA or the Recommended Dietary Allowance for proteinis a diffident 0.8 grams of protein per kilogram of body weight. When eat moreprotein than your body needs, the extra protein is used to deliver your bodywith energy or turned into fat. 
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