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kow [346]
3 years ago
5

witch statement is one of the three parts of a cell theory? A-all cells come from other cells B-cells come from crystals C-cells

assemble themselves from whatever is around D-plant and animal cells are exaclty the same
Biology
2 answers:
Andreyy893 years ago
5 0
It’s A. I learned this in middle school.
kirill115 [55]3 years ago
4 0
Answer A seems to be the best choice
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Can someone please help (its either a or d)
Anika [276]

Answer:

I am pretty sure it would be A

5 0
3 years ago
In a genetic cross between two flowering plants that are heterozygous for the color trait, red flowers (R) are dominant to white
Sedaia [141]
Draw a punnet square:
R. r.
R. RR. Rr
r. Rr. rr

Any combo that results in an R results in red flowers.

3/4 offspring have red flowers.
3 0
3 years ago
16-16: In a series of experiments, genes that code for mutant forms of an RTK are introduced into cells. The cells also express
kolezko [41]

Answer:

Kinase-connected receptors or receptor tyro-sine kinases react for the most part to protein and chemical go between. A solitary trans membrane helix interfaces the extracellular restricting area to the intra-cellular space. e.g. insulin, development factors. The official of the ligand triggers the commencement of a few succession of occasions related with phosphorylation of proteins, this is called protein kinase course.  

For instance, the official of development hormone to the receptor in the plasma layer causes dimerization (by the actuation of Janus kinase 2, JAK2) of the receptor (conformation change) that bring about auto-phosphorylation of tyro-sine buildups. The official of SH2-space (src homology) protein (Grb-2) to the phosphorylated tyro-sine buildups invigorates cell development through a course of protein phosphorylation.  

a). RTKs are the trans-membrane receptors, which have a ligand restricting site on the extracellular area and tyro-sine authoritative on the intra-cellular space. In the event that it comes up short on the extracellular area, the ligand can't tie to the receptor site, so no cell reaction happens.  

b). On the off chance that it does not have the intra-cellular space, the ligand can tie to the receptor site, the receptor can't impart signs tot eh intra-cellular area because of the absence of intra-cellular space.

5 0
3 years ago
Read 2 more answers
In what type of asexual reproduction are seeds produced even without the joining of sperm and eggs?
dem82 [27]
This type of asexual reproduction is called apomixis. 
Apoximis is reproduction by special generative tissues without fertilization. It includes parthenogenesis in animals, in which the new individuals develop from unfertilized egg, and apogamy in certain plants in which the generative tissues may be the sporophyte or the gametophyte. 
6 0
2 years ago
Almost all animals share the following characteristics except
Aleks [24]

The correct answer is A.

Animal cells do not have a  cell wall.

A cell wall is the rigid, outermost covering of plant cells and is made up of cellulose.  It is absent in animal cells. The cell wall is visible under a light microscope.

Animal cells are instead covered by a cell membrane. It is made up of lipids, proteins, and small amounts carbohydrates. It is a thin and delicate structure  that can only be seen using an electron microscope.

4 0
2 years ago
Read 2 more answers
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