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garri49 [273]
3 years ago
9

Cells that do have a nucleus are called _______ cells. a. Prokaryotic b. Eukaryotic

Biology
2 answers:
svetlana [45]3 years ago
7 0
It’s B they contain a nucleus
CaHeK987 [17]3 years ago
6 0

Answer:

The answer is B.

Explanation:

A way to remember this is...

PROkaryotic = NO nucleus ("pro" rhymes with "no")

EUkaryotic= nUcleus ("eu" in EUkaryotic rhymes with "u" in nUcleus)

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Calculate the acceleration of a boat that has been cruising at 15 m/s but speeds up to 45 m/s in about 6 seconds. Don’t forget y
Vera_Pavlovna [14]
Calculate the acceleration of a boat that has been cruising at 15 m/s but speeds up to 45 m/s in about 6 seconds. Don’t forget your units, m/s2. In order to calculate the acceleration of the boat we first have to identify the suited formula for acceleration in this scenario.

Hence, a = vf – vi / t. Vi = 15 m/s Vf = 45 m/s T = 6 seconds  

Solution:
A = 45 m/s – 15m/s / 6s
A = 5m/s^2



6 0
3 years ago
Read 2 more answers
What happens to a female sex cell that has left the ovary if it isn't fertilised?
Juli2301 [7.4K]
A sex cell that hasn't been fertilized and has left the ovary would come out during the menstrual cycle under normal circumstances.
6 0
3 years ago
Which is a mechanism for restricting the movement of proteins in the plasma membrane? Choose one or more:
alexgriva [62]

Answer:

The correct answers are option A. "tethering proteins to the cell cortex", B. "using barriers such as tight junctions", C. "tethering proteins to the extracellular matrix", D. "forming a covalent linkage with membrane lipids", E. "tethering proteins to the surface of another cell"

Explanation:

According to the fluid-mosaic model, the components of cell membranes are in constant movement forming a barrier to avoid unwanted exterior component internalization and to avoid the loss of precious internal components. This constant movement could cause that proteins move across the plasma membrane. But, this is avoided by several mechanisms including:

A. Tethering proteins to the cell cortex. The cell cortex is a rigid structure made of actin and actomyosin. Proteins found in the plasma membrane are tethered to this structure to restrict their movement.

B. Using barriers such as tight junctions. Tight junctions are barriers found in epithelia made of claudin and occludin proteins. These barriers are impenetrable, which avoid the movement of proteins in the cell membrane.

C. Tethering proteins to the extracellular matrix. The extracellular matrix is made of several proteins and macromolecules that provide a structural and biochemical support to cells that are nearby. Proteins could be tethered to this rigid structure as well.

D. Forming a covalent linkage with membrane lipids. The proteins in the cell membrane that form a covalent linkage with membrane lipids are known as lipid-anchored proteins, or lipid-linked proteins.

E. Tethering proteins to the surface of another cell. When cell-cell communication take place it is possible that proteins in the cell membrane got tethered to the surface of the other cell.

6 0
3 years ago
What element is found in all organic molecules? oxygen nitrogen phosphorus carbon
kvasek [131]
I just looked it up, it's carbon!
4 0
2 years ago
Read 2 more answers
What are the different methods of transport across a membrane ?
dusya [7]
If I remember correctly, there are two main types of transport—passive and active. Passive transport does not require energy or ATP, whereas active transport does.


Types of passive transport include diffusion and osmosis, both of which involve moving down a concentration gradient and thus not requiring energy.


Active transport moves up the concentration gradient and does require energy.


Perhaps someone who has taken bio within the last several years can correct anything I might have misstated here.
6 0
3 years ago
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