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-BARSIC- [3]
3 years ago
11

What prevents sperm cells from traveling the entire distance to the egg?

Biology
1 answer:
tatuchka [14]3 years ago
5 0
Birth control can prevent that. Such as condoms or diaphragms.
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An organism's "trophic level" refers to _____. see concept 54.2 (page 1221)
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The amount of energy from the sun that the organism absorbs.
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4 years ago
Why doesn't a skin cell make crystallin protein? Select all that apply. Select all that apply. Skin cells use different dna for
Phantasy [73]

Answer;

-Skin cells do not need crystallin for their function.

-Skin cells have the crystallin gene but do not express it.

Explanation;

-The crystallin proteins are water-soluble structural proteins that occur in high concentration in the cytoplasm of eye lens fibre cells. It has also been identified in other places such as the heart, and in aggressive breast cancer tumors.

-The main function of crystallins at least in the lens of the eye is probably to increase the refractive index while not obstructing light. The skin cell does not make crystallin protein because the skin cells do not need crystallin for their function and also they have the crystallin gene but do not express it.

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3 years ago
Which phrase describes the relative age of a rock?
finlep [7]

Answer:

Uses the law of superposition to determine which rock is older or younger.

Explanation:

Relative age refers to the age of the rock when compared to other rocks. The law of superposition was developed by Nicholas Steno. In this process, you determine which rock layer is older or younger in terms of the sequence they were laid out or layers were formed. This law states that the lower the layer, the older the rock layer is as compared to those on top of it.

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3 years ago
The proximal radioulnar joint is a __________ joint
Andreas93 [3]
The proximal radioulnar joint is a synovial joint
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4 years ago
WILL MARK BRAINLIEST!!!! Can someone help me with this question?
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Answer:

Rockfish larvae are pelagic, there is genetic evidence for limited dispersal within Puget Sound for the quillback and copper (S. caurinus) rockfish (Seeb 1998) as well as for differentiation from coastal populations of brown rockfish (S. auriculatus) (Buonaccorsi et al. 2002). This degree of population structure is consistent with other genetic and otolith studies from coastal Pacific rockfish populations

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4 years ago
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