Biología preguntas y respuestas

Tue of false. \( \begin{array}{ll}\text { (a) sexual reproduction causes variation. } \\ \text { (b) DNA is made up of chromosomes. } & \text { True/false } \\ \text { (c) Females have one less chromosome than males. } & \text { True/False } \\ \text { (lf a couple have three daughters, the chance of them having } & \text { True/False }\end{array} \)

How long does it take to digest chicken, red meat, and pork?a) Chicken: Approximately 2-3 hoursb) Red meat: Approximately 3-4 hoursc) Pork: Approximately 4-6 hoursd) All of the above

A biologist isolated a sample of an enzyme called lactase from the intestinal lining of a calf. The substrate of lactase is the disaccharide lactose. The enzyme breaks a lactose molecule in two, producing a molecule of glucose and a molecule of galactose. The biologist performed two series of experiments. First, she made up \( 10 \% \) lactose solutions with different concentrations of enzyme and measured the rate at which galactose was produced (in terms of grams of galactose produced per minute; a bigger number means a faster breakdown of lactose). The results of these experiments are shown in Table. A below. In the second series of experiments, as shown in Table B, she prepared a 2\% enzyme solutions with different concentrations of lactose and again measured the rate of galactose production.

A protostar is not _____.A. producing energyB. collapsingC. in hydrostatic equilibriumD. heating up

16. Escribe en el espacio la respuesta correcta a. Las algas y los protozoos pertenecen al reino b. Los champinones pertenecen al reino c. La mariposa y el gusano pertenecen al reino d. Los girasoles y los áboles pertenecen al reino e. Los cocos y espirilos pertenecen al reino

Scenario: Several residents in your care have come down with a nasty, intestinal virus that causes diarrhea. One resident, Mrs. Grande, is so weak that she was unable to get out of bed in time and soiled her clothing and bedding. Reflection: 1. Where is the most likely portal of exit for this pathogen? 2. What are six infection control precautions/practices you take when cleaning up Mrs. Grande that will keep this virus from spreading to other residents, your co-workere, and yourself? 3. List three factors that can make a person more likely to get an infection

Scenario: Several residents in your care have come down with a nasty, intestinal virus that causes diarrhea. One resident, Mrs. Grande, is so weak that she was unable to get out of bed in time and soiled her clothing and bedding. Reflection: 1. Where is the most likely portal of exit for this pathogen?

Which sentence best describes vestigial structures? A. They contain genetic mutations.B. They may have had an important function in the past.C. They are necessary for an organism's survival.D. All animals have them.

Changes in climate can negatively affect __ a. forest b. crop yields c. water supplies d. all of the above

Humans accelerate the production of carbon dioxide by burning fossil fuels. True False