BIOLOGY HIGH SCHOOL

All life must maintain an internal balance, despite environmental changes. This is called _____.stimulus
heredity
homeostasis
evolution

Answers

Answer 1
Answer: The answer is homeostasis because evolution is the gradual development of something, thus it cannot fit. Heredity can't fit because it deals with the genetic transmission of characteristics from a parent to a child and/or offspring. It also can not be stimulus because it refers to something that arouses or evokes action in something. Therefore, homeostasis is the only suitable answer as it deals with the tendency to acquire equilibrium within an internal environment. 

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After reviewing the results of your science fair project, you state that water has increased the growth of fungi. This is a(n)
Which of the following describes why wetlands are important to the water cycle?
What structure is found in the area designated by #6?A)cerebellumB)brain stemC)spinal cordD) cerebrum
In which situation is the object experiencing balanced forces? A) A girl swings on a swing at the playground. B) A car brakes as it approaches a traffic light. C) A sled speeds up as it slides down a snow-covered hill. D) A sky diver reaches terminal velocity when he stops accelerating.

Trey is looking at a cell under the microscope. It is attached to many other cells, and it has a nucleus and membrane bound organelles. It has no cell wall. In which kingdom should this organism be classified?

Answers

Answer:

The most appropriate kingdom would be Animalia.

The common characteristics of the kingdom Animalia may include:

  • The organisms of this kingdom are eukaryotic. Thus, they have a well-developed nucleus and other cell organelles like mitochondria et cetera.
  • They are multi-cellular organisms, that is, they are composed of many cells. They may show body organization like cells→ tissues→ organs→ organ systems→ organism
  • Unlike plants, they lack chloroplast and cell walls.
  • They are usually heterotrophic.

Thus, the cell can be classified as Animalian cell.

Answer:

Explanation:

Animalia

Select all that apply.Which of the following are methods of molecular biotechnology?
selective breeding
recombinant DNA
hybridization
cloning
induced mutations
DNA profiling

Answers

A couple of the methods of molecular biotechnology are cloning and recombinant DNA.

Answer:

All

Explanation:

The study of molecular basis (study of protein and nucleic acid) of any biological activity through intervention of laboratory technology is termed as molecular biotechnology

There are several methods of molecular biotechnology such as -  

a) DNA cloning

b) Bacterial transformation

c) Chromosome integration

d) DNA polymerase & synthesis

e) Molecular hybridization

f) Polymerase Chain Reaction (PCR)

g) Expression cloning

h) Gel electrophoresis

i) Macromolecule blotting and probing

j) Arrays  

Etc.  

Hence, all are methods of molecular biotechnology

in the alternation of generations life cycle two gametes fuse together to form a a. gametophyte plant. b. meiotic division. c. zygote. d. sporophyte plant.

Answers

Answer:

C. Zygote

Explanation:

Alternation of a generation refers to a type of life cycle wherein organisms spend part of their life span in the gametophytic stage and part in a sporophytic stage.  

The gametophytic stage is the one that bears gametes producing organs and produce gametes. Male and female gametes fuse together to form a zygote. The zygote develops into sporophyte by repeated cell divisions.

The sporophyte stage of the life cycle is the one that is responsible for the formation of spores. Spores germinate to give rise to the gametophyte stage and the cycle repeats itself.

For example, flowering plants have a dominant sporophytic phase. The haploid male and female gametes are formed in microsporangia and megasporangia respectively.

The male gametes of flowering plants are carried by pollen to the female gamete, the egg cell. This is followed by the fusion of male and female gamete to form a diploid zygote. The zygote divides mitotically and forms an embryo.
the corect answer C a zygote

Why are chloroplasts absent in epidermal cells ?

Answers

the function of epidermis is to protect the leaf
make it air tight 
prevent water loss as it is waxy
also it is transparent and allows all light to enter...
   chloroplast is required for carrying out process of photosynthesis...
    as epidermis is not specialized to carry out photosynthesis... so it does not have any chloroplast...
Its function is protect leaves

What causes the day/night cycle of Earth?Earth's spinning in space
The sun's rotation around Earth
The moon's rotation around Earth
Earth's orbit around the sun

Answers

Earth's orbit around the sun

Explanation:

The definition of an orbit is a circular shape, the rotation of one full circle or a range of experience. The 365 days it takes the earth to get around the sun is an example of the time it takes for a complete orbit or full circle around.

Biochemical analysis uses similarities in __________ as evidence for evolutionary relationships

Answers

DNA sequence

Biochemical analysis will use DNA sequences to understand, contrast and explain a certain point of an evolutionary process. DNA sequence are analysed by the structure of the chromosomes. Chromosomes are helpful to describe both the person and the ancestral history of the specific individual. 

DNA sequences. Biochemical analysis looks at DNA, and also at proteins.

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