BIOLOGY HIGH SCHOOL

_____ are masses of cells full of pores.

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Answer 1
Answer: The correct answer is Porifera; specifically sponges. Sponge, from the phylum of Porifera, are masses of cells full of pores. Sponges are multicellular organism that had their bodies full of pores and channels that allows the water to circulate throughout.

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Layers of epithelial tissue that serve as barriers to pathogens is called
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Which of the following takes place inside both mitochondria and chloroplasts? A. The flow of hydrogen ions is used to make ATP. B. The Calvin cycle builds sugar molecules. C. The Krebs cycle breaks down carbon based molecules. D. Light energy from the sun is captured and used to make ATP.
A father with brown hair (Hh) and brown eyes(Bb) marries a woman with brown hair (Hh) and blue eyes(bb). What is the chance they will have a blonde haired, blue-eyed baby?

Which of Mendel's generations was allowed to self-pollinate

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the second generation was the one that was allowed to self pollinate 

When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, why was it impossible to observe segregation? A. Alleles for height do not segregate in the F2.

B. Alleles segregate only in the F2 generation.

C. Alleles segregate best when two tall plants are crossed.

D. Alleles in the F1 must be Tt to have height variety in the F2.

Answers

When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, it was impossible to observe segregation because D) alleles in the F1 must be Tt to have height variety in the F2.

Answer:

Alleles in the F1 must be Tt to have height variety in the F2.

Explanation:

  • The law of segregation given by Mendel states that the pair of an allele for a given gene separate during the formation of gametes and then these gametes fuse randomly with each other during fertilization to determine the genotype of the individual.
  • Therefore, for a pure breeding tall plant, the alleles would form two gametes each having the allele T and for a pure breeding small plant, each of the gametes will have allele t.
  • Therefore, the only possible combination from TT X tt would be Tt and thus, segregation is not observed.

Tại sao con người chúng ta lại sốt nhiều lần như vậy?

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Answer:

Fever is an elevated temperature of the human body that is substantially beyond the normal range. Normal body temperature fluctuates daily from about one degree below 98.6 degrees Fahrenheit to one degree above that number. Lower body temperatures usually occur before dawn; higher temperatures in the afternoon.

Body temperature also varies slightly depending on where on the human body it is measured. Rectal (internal) temperature tends normally to be higher than skin (surface) temperature. Oral and armpit temperatures can approximate actual body temperature and are more convenient to measure.

A depression in the ground due to a cave collapse or acidic water dissolution of limestone is called a A. cave. B. stalactite. C. sinkhole. D. stalagmite.

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A cave is a cave...you know, something generally in the rock, something that bears sleep in. It isn't really a depression in the ground. A stalactite is a build up of sediments from the ceiling that drip down to form a icicle shaped rock hanging from the ceiling, and a stalagmite is the same thing, but on the ground. So out of all those choices, I would choose answer D, a sinkhole.

_________ tissue can tolerate the amount of pressure exerted by a hemostat or low-compression biting instruments such as an Allis and it tends to heal rapidly unless diseased or infected.

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Answer:

Elastic tissue.

Explanation:

Tissue may be defined as the group of similar cells that perform the specific functions of the body. Different type of tissue are elastic tissue, fibrous tissue, connective tissue, muscle tissue and many more.

Elastic tissue has the ability to tolerate the variable amount of pressure. This tissue can heal easily if infected during the disease. Elastic fibers are present in the elastic tissue. This tissue is present in heart walls, tendons and ligaments.

Thus, the answer is elastic tissue.

in pole beans, green pods (G) are a dominate trait while yellow pods are a recessive trait. A bean plant with GG genotype is crossed with a second plant that has the gg genotype. if this cross produces 500 off spring how many of the offspring will be green

Answers

100% , if there is a  dominate allele present  it will be the dominate trait
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