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3 years ago

Which organisms lived during the centozoic era?

Biology

1 answer:

IRINA_888 [86]3 years ago

4 0

sabre-toothed cats, cave bears, giant deer, etc..

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If only a single member of a pair of chromosomes is present in a cell, it is a _____ condition and is most likely a _____ cell.

sashaice [31]

The answer is B. haploid; reproductive.

A haploid cell contains half the number of chromosomes found in the diploid cell, namely, it contains only one set of chromosomes. So, the condition must be haploid. The gamete cells in the organism are sperm cells and egg cells, thus, reproductive cells. So, the condition must be reproductive.

8 0

4 years ago

Which phase of the cell cycle is longest and explain

Katarina [22]

The Prophase it’s about 80% of the entire process

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4 years ago

Read 2 more answers

Now consider a single base mutation in a codon for leucine that creates a codon for phenylalanine. A true reversion changes the

madam [21]

Answer:

options A, B, D and E

Explanation:

leucine codons include: UUA, UUG, CUU, CUC, CUA, CUG

phenylalanine codons include: UUU, UUC.

CUU

replace C with U to give

UUU phenylalanine codon

replace underlined with A

UUA leucine codon

CUC

replace underlined with U

UUC phenylalanine codon

replace underlined with A or G

UUA, UUG leucine codons

UUG

replace underlined with U

UUU phenylalanine codons

replace underlined with C

CUU leucine codon

UUA

replace underlined with U or C

UUU or UUC phenylalanine codons

replace U with C

CUU or CUC leucine codons

7 0

3 years ago

What is a galaxy? Describe three different shapes that a galaxy may have. List the common components of a galaxy.

Eva8 [605]

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias, literally "milky", a reference to the Milky Way.

Elliptical: These have a faint, rounded shape, but they're devoid of gas and dust, with no visible bright stars or spiral patterns. ...
Spiral: The Milky Way is one of the larger spiral galaxies. ...
Irregular: These are small, faint galaxies with large clouds of gas and dust, but no spiral arms or bright centers.

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3 years ago

Which high-energy molecule and electron carrier are produced by the light reaction of photosynthesis?

charle [14.2K]

Answer:

ATP and NADPH are the high-energy molecule and electron carrier are produced by the light reaction of photosynthesis

Explanation:

In the thylakoid membrane of the chloroplast the light reaction with photosynthesis takes place. In the photosystem II the light energy is used for making of photolysis of water molecules, that also responsible for the release of electrons and oxygen having greater energy. The electrons are then moved through the electron transport chain(ETC) located in the same membrane and leads to the generation of NADPH and ATP. NADPH and ATP are molecules with greater-energy which carry and pass electrons to the dark or Calvin reaction which leads to the production of sugar.

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3 years ago