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2 years ago

What is the specific function of a heterocyst cell of an Anabanea filament?

1 answer:

3 0

Heterocyst-forming cyanobacteria differentiate highly specialized cells to provide fixed nitrogen to the vegetative cells in a filament. In the presence of a source of combined nitrogen such as nitrate or ammonium, Anabaena PCC 7120 grows as long filaments containing hundreds of photosynthetic vegetative cells.

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URGENT PLEASEEEE

agasfer [191]

Answer:

They are large molecules that blind readily with proteins , cellulose, starches and minerals.

Explanation:

it hides into leather

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2 years ago

If a characteristic is X-linked it

solniwko [45]

A. occurs mostly in males. Females may exhibit symptoms but rarely. Female carriers are asymptomatic (not affected). Characteristic cannot be transmitted male to male. Affected males transmit the trait to all daughters.

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3 years ago

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A cell in the body is recognized as "self" by its _________ and is therefore not targeted by the immune response for destruction

otez555 [7]

Answer:

Explanation:

The major histocompatibility complex (MHC) is a group of genes whose function is to codify proteins that participate in the immune response, helping the system to recognize foreign substances to develop an immune response.

Histocompatibility or compatibility of tissue is given by self-identifications molecules (antigens) located on the surface of cells, membrane, these molecules are almost unique to each person, letting the body to distinguish self from non-self.

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3 years ago

In garden peas, the yellow seed trait is dominant over green seeds. Also, the round seed trait is dominant over the wrinkled-see

Darina [25.2K]

Answer:

405 individuals will be yellow and round seeded.

Explanation:

Available data:

the yellow seed trait is dominant over green seeds
round seed trait is dominant over the wrinkled-seed trait
These genes are on separate chromosomes

Let´s name the seed color genes Y, and the seed shape gene R

Y is the dominant allele for seed color expressing yellow

y is the recessive allele for seed color expressing green

R is the dominant allele for seed shape expressing round

r is the recessive allele for seed shape expressing wrinkled

Cross: between two plants that are heterozygous for both traits

Parental) Yy Rr x Yy Rr

Gametes) YR yR Yr yr YR yR Yr yr

Punnet Square) YR yR Yr yr

YR YYRR YyRR YYRr YyRr

yR YyRR yyRR YyRr yyRr

Yr YYRr YyRr YYrr Yyrr

yr YyRr yyRr Yyrr yyrr

F1) 720 individuals

9/16 yellow and round seeded individuals, Y-R-

3/16 green and round seeded individuals, yyR-

3/16 yellow and wrinkle seeded individuals, Y-rr

1/16 green and wrinkle seeded individuals, yyrr

Note: the "-" symbol in the phenotypes means that there it could be either a dominant or recessive allele.

If 720 is the total number of individuals in the F1, then:

16 possible genotypes ---------- 100% of the progeny -------- 720 individuals

9 yellow and rounded----------- 56.25% ----------------------------405 individuals

3 green and rounded-------------18.75%------------------------------135 individuals

3 yellow and wrinkled-------------18.75%------------------------------135 individuals

1 green and wrinkled--------------6.25%-------------------------------45 individuals

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3 years ago

How many times more ATP can be formed by an electron transport chain than can be formed by a citric acid cycle?

Alexeev081 [22]

It should be 32 ATPs, since the electron transport chain produces 34(38) ATPs, and the citric acid cycle produces only 2 ATPs. 34-2=32

4 0

3 years ago

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