Which ,begin emphasis,best,end emphasis, explains the role of enzymes in a living cell?
Answer options with 4 options
A.
Enzymes add heat energy, speeding up a chemical reaction.
B.
Enzymes lower the energy required to start a chemical reaction.
C.
Enzymes increase the energy required to start a chemical reaction.
D.
Enzymes remove heat, controlling the output of a chemical reaction.
B.
Enzymes lower the energy required to start a chemical reaction.
The Mendelian ratio of 9 colon 3 colon 3 colon 1 is found in the course of
Answer options with 5 options
A.
monohybrid crosses.
B.
dihybrid crosses.
C.
crosses of two lines, each pure but for different alleles of a trait.
D.
repeated crossing of an Upper F subscript 1 heterozygote with a pure recessive.
E.
replication.
A. monohybrid crosses.
tudents collect this data about the inheritance of height in pea plants:
Phenotype Type of Allele Symbol
Tall pea plant Dominant Uppercase T
Short pea plant Recessive Lowercase t
Question
The students cross two parent pea plants. Seventy-five percent of the offspring are tall, and twenty-five percent of the offspring are short.
What are the genotypes of the parent pea plants?
Answer options with 5 options
A.
Uppercase T Uppercase T and Uppercase T Uppercase T
B.
Uppercase T Uppercase T and Uppercase T Lowercase t
C.
Uppercase T Uppercase T and Lowercase t Lowercase t
D.
Uppercase T Lowercase t and Uppercase T Lowercase t
E.
Uppercase T Lowercase t and Lowercase t Lowercase t
B. Uppercase T Uppercase T and Uppercase T Lowercase t
A leaf is made up of many different cells. The cells are grouped into different tissues, such as the veins or the skin of the leaf.
Which level of organization does the leaf represent?
Answer options with 4 options
A.
organ
B.
tissue
C.
circulatory system
D.
integumentary system