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marysya [2.9K]
3 years ago
7

Did dinosaurs exit at the same as mammals ?explain your answer using the geologic time scale

Biology
1 answer:
Vsevolod [243]3 years ago
8 0

Explanation:

Mammals are the only living synapsids. The synapsid lineage became distinct from the sauropsid lineage in the late Carboniferous period, between 320 and 315 million years ago. The sauropsids are today's reptiles and birds along with all the extinct animals more closely related to them than to mammals.

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During mitosis, chromosomes are moved and separated through the use of spindles composed of ________________ structures.
sesenic [268]

During mitosis, chromosomes are moved and separated through the use of spindles composed of microtubule structures.

Explanation:

Throughout mitosis, the chromosomes are initial replicated (copied) and so distributed into a pair of new "daughter" cells. They're replicated throughout the S section of interphase, and within the following phases (prophase, metaphase, anaphase, telophase) are organized, separated, and repackaged at opposite ends of the cell, at that purpose the cell divides. The strand of chromosomes split just like the cell throughout the cellular division. They split in half.

8 0
3 years ago
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Why do you think it's important to determine the shape of the earth?​
IgorC [24]

Answer:

so that you would know what views are on each side and the shape of the describes that we are outside the earth surrounded by water

8 0
2 years ago
Ribosomes provide the scaffolding on which tRNAs interact with mRNA during translation of an mRNA sequence to a chain of amino a
vampirchik [111]

Answer:

a. True

Explanation:

Ribosomes are ribonucleoprotein complexes composed of RNA and proteins, which have two main roles 1-decode the message of the messenger RNA (mRNA) molecule and the formation of peptide bonds in the protein. For this purpose, each triplet of nucleotide bases or 'codon' in the mRNA sequence is used to assemble specific amino acids in the nascent polypeptide chain. Although different, both prokaryotic ribosomes and eukaryotic ribosomes are composed of two subunits: one small subunit that decodes the mRNA into a specific amino acid chain, and one large subunit that forms the peptide bonds in the polypeptide chain. Each ribosomal subunit is in turn composed of ribosomal RNAs and proteins. These ribosomal RNAs act as scaffolds by combining with proteins that assemble into ribosomes (i.e., small and large ribosome subunits).

8 0
3 years ago
Which best describes metabolism? A. all anabolic chemical reactions in the body B. all catabolic chemical reactions in the body
AVprozaik [17]

Answer:

C  I think

Explanation:

6 0
3 years ago
Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?
kolezko [41]

Ans.

Diffusion, osmosis, and active transport are mechanism of cellular transport that involves movement of molecules through plasma membrane. Diffusion shows movement of small, hydrophobic particles without the help of protein molecules through cell membrane along the concentration gradient.

Osmosis involves movement of water molecules against concentration gradient (from an area of high solvent concentration to an area of low solvent concentration) through cell membrane.

Active transport shows movement of particles, against the concentration gradient, means from a region of higher to lower concentration of molecules through cell membrane. It involves transport through membrane proteins.

Thus, the part of cell, which is affected by the movement of molecules through osmosis, diffusion, and active transport is cell membrane or plasma membrane.

7 0
3 years ago
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