The function of the lens is that it allows light rays to focus into the retina. They are composed of fluids that contains lots of nutrients for the lens to gain from it and cleanses dirt if it comes in contact the eye. Overtime, this lens, will slowly degrade as its fluid will start to lose.
Innate: keratinized epithelium
stratified squamous epithelium hypodermal areolar connective tissue antigen presenting cells major histocompatibility complexes complement (antibody -dependent pathway )
Innate or non-specific response is the first defense against invaders. Components of this response include physical (e.g. skin . mucosa) and chemical barriers against pathogens and cells such as Natural Killer cells, macrophages, neutrophils, dendritic cells, mast cells, basophils, eosinophils. Innate response reacts immediately.
Adaptive: immunoglobulin plasma cells agglutinin
helper t cells memory t cells cytotoxic t cells cd4+cells
t lymphocytes
Adaptive immune response or specific response is specific to the pathogen presented and mediated by lymphocytes, B and T cells. Adaptive immune response creates immunological memory after the first, initial l response to a specific pathogen which leads to enhanced response.
Answer:
C. 1/4
Explanation:
Let's assume that the allele for the spotted coat is "S" and the one for the even coat is "s". The allele "L" gives short horns while the recessive allele "l" imparts long horns. The genotype of the cattle heterozygous for both traits would be SsLl. A cross between two heterozygous cattle would produce progeny in following phenotype ratio=
9 spotted coat and short horns: 3 even coat and short horns: 3 spotted coat and long horns: 1 even coat and long horns.
Therefore, the proportion of the progeny with long horns = 4/16= 1/4
The first organisms to inhabit Earth were prokaryotes that
lived 3.5 billion years ago. prokaryotes are well organised, achieving all of an organism’s life functions
within a single cell. These were the precursors to eukaryotic cells
The ecosystem of the forest is formed by the interaction between the abiotic and biotic factors. Abiotic factors are the non-living factors: water, temperature,light,cloud cover, and soil. Biotic factors oh the other hand are the living organisms. Tropical rain forests<span> are hot, moist forests found near Earth's equator.</span>
Temperate rain forests are cool and dry.
Abiotic factors in temperate rain forest:
1. Temperature:The climate in the temperate rain forests is mild.
2. Water: moist and lush.
3. Light: many clouds block the sunlight.
4. Soil: nutrition rich.
Biotic factors:<span>beavers, raccoons , cougars and black bears. </span>
Abiotic factors in tropical rain forest:
1. Temperature: hot, near the Earth's equator
2. Water:60
to 160 inches of precipitation
Biotic factors: the greatest
biodiversity in the world<span>,
rubber and bamboo trees, sloths, anteaters, poison dart frogs, </span>
