Biología preguntas y respuestas

Small phagocytic glial cells, which are derived from white blood cells, are called oligodendrocytes. astrocytes. Schwann cells. microglia. ependymal cells.

The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by ependymal cells. astrocytes. oligodendrocytes. Schwann cells.

\begin{tabular}{l} Remember and understand \\ 1. a. State whether the following statements are true or false. \\ Statements \\ i. Human female gametes are called ova and male gametes are called sperm. \\ ii. Mitosis is the type of cell division that is used to produce sex cells. \\ \hline iii. All chromosomes are the same size. \\ \hline iv. Non-homologous chromosomes have the same relative size, position of \\ centromere and stained banding patterns. \\ \hline \begin{tabular}{l} v. Human males possess a pair of \( X \) chromosomes \( (X X) \), whereas human \\ females possess an \( X \) and a \( Y \) chromosome (XY). \\ \hline vi. Sometimes a genetic mistake or mutation can occur that results in more or \\ less of a particular type of chromosome. \\ \hline vii. Differences between the chromosome pair size, shape and banding can be \\ used to distinguish them from each other and to construct a karyotype. \\ \hline viii. Telomeres (caps of DNA on the tip of the chromosome), which enable DNA \\ to be replicated safely without losing valuable information, shorten each \\ time the cell divides. \end{tabular} \\ \hline\end{tabular}

Why is so much energy lost from one trophic level to another? A. Organisms must use energy to warm their bodies B. Organisms stop growing as adults, so they don't need all the energy they take in. C. Cellular respiration is an efficient process D. The conversion of biomass from one organism to another is inefficient Why do energy pyramids and biomass pyramids usually have a similar shape? A. An energy pyramid cannot contain more energy than organisms need B. As energy is lost, more biomass can be supported C. The amount of biomass on any level cannot be greater than the available energy can support D. Both energy and biomass are lost to the environment at equal rates How does energy flow in a food chain? A. From the lowest trophic level to the highest B. From the highest trophic level to the lowest C. From the sun to the producer D. From the consumer to the producer Which organism is not paired correctly with its feeding relationship? A. Rabbit-carnivore B. Fungus-decomposer C. Human-omnivore D. Millipede-detritivores Which of the following in NOT an example of a symbiotic elationship? A. A mother bear caring for her cub B. Worm living in a cow's intestine

A pack of wolves is fighting with a grizzly bear over a kill. What kind of competition is this? A. Interspecific competition B. Intraspecific competition C. Predation

Which of the following is usually found in the smallest number in pyramid of numbers? A. Producers 3. Primary consumers C. Secondary consumers ?. Tertiary consumers

A. Consumer makes its own energy and begins the food chain. B. Producer C. Herbivore D. Decomposer A plants for their energy. A. Producer B. Primary Consumer C. Secondary Consumer D. Tertiary Consumer A type of consumer that eats primary consumers is called a... A. Herbivore B. Prey C. Tertiary D. Secondary Consumer A. Fish B. Bacteria C. Plants D. Seaweed Which of the following is usually found in the smallest number in a pyramid of numbers? A. Producers B. Primary consumers C. Secondary consumers D. Tertiary consumers

QUESTION 5 The lake near a small city has become polluted. One group blames the local factory for the pollution. The factory claims that non-point source pollution from the growing city population is to blame. Which of these tests would NOT help local citizens figure out if the pollution was from a point source or non-point source? Observe the areas where water leaves the factory. Laboratory analysis to find out what pollutants are in the water. Examine the wildlife of the lake to see how it is affected by the pollution. Question 6

5. What is the application of Animals in waste treatments, bioremediation, bioenergy and recy 6. What is the Economic Importance of Animals? ( \( 2 \% \) ) 7. Show animals evolution by using Phylogenetic tree \& describe taxonomic keys whenever n

What is the importance of Animal in agriculture including (soil fertility, tissue culture, animal bre and transgenic animals, plant disease and pest management)? (3\%) What is the importance of Animals in the conservation of Ecosystem? (1\%)