North America’s biological field stations have long been home to a rich legacy of research results, scientists say, making them important places for serendipitous discoveries in the biological and environmental sciences.
In a paper published in the April issue of the journal BioScience, researchers affiliated with the National Science Foundation’s (NSF) Long Term Ecological Research (LTER) [...]
Where do birds get their red feathers from? According to Esther del Val, from the National History Museum in Barcelona, Spain, and her team, the red carotenoids that give the common crossbill (Loxia curvirostra) its red coloration are produced in the liver, not the skin, as previously thought.
Their findings, published online in Springer’s journal Naturwissenschaften, [...]
1. Which answer choice correctly identifies the abiotic items in a pond?
a. fish, plants, parasites
b. plants, water, and rocks
c. fish, dissolved gases, and parasites
d. water, dissolved gases, and rocks
1. Which statement correctly describes how chromosomes function in an organism?
a. the chlorophyll in chromosomes helps produce sugars for energy.
b. the patterns of chromosomes are color-coded for different ribosomes.
c. the codes in chromosomes determine what proteins the cells produce.
d. The number of chromosomes segments determines how proteins enter the cell.
1. A DNA molecule is being transcribed onto a RNA molecule. The next base to be transcribed on the DNA sequence is adenine. Which base will be complements in the RNA molecule?
A. uracil
B. adenine
c.thymine
d. guanine
A pea plant’s cells have one allele for tallness (T) and one for shortness(t). According to Mendel’s law of segregation, which alleles could be passed on to the pea plant’s sex cells?
A. T or t
B. TT or tt
c. T, t, or Tt
d. TT, tt, or tt
Which statement can be explained by Mendel’s law of dominance?
a. Heterozygous offspring will exibit the dominant trait in the phenotype.
b. During gamete formation, the two allelles responsible for the trait seperate.
c. Allelles from different traits are not distributed to sex cells independently of one another.
c. Alleles for different traits are not distributed to sex cells [...]
Micro-organisms occurring naturally in coastal mudflats have an essential role to play in cleaning up pollution by breaking down petrochemical residues.
Research by Dr Efe Aganbi and colleagues from the University of Essex, presented at the Society for General Microbiology’s meeting at Harrogate March 30, reveals essential differences in the speed of degradation of the chemicals [...]
Bacteria are single cell organisms with no nervous system or brain. So how do individual bacterial cells living as part of a complex community called a biofilm “decide” between different physiological processes (such as movement or producing the “glue” that forms the biofilm)?
1. Plants require mositure, oxygen, carbon dioxide, lighjt, and minerals for growth. These requirements are best described as
a. biotic factors
b. abiotic factors
c. climate factors
d. respiratory factors
